This patch is a bugfix for the use of cfb_* functions instead of sys_* functions. sys_* should be used with vmalloced framebuffers. the previous cfb_ use would not work for callers of imageblit/etc. Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1000 lines
24 KiB
C
1000 lines
24 KiB
C
/*
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* linux/drivers/video/metronomefb.c -- FB driver for Metronome controller
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*
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* Copyright (C) 2008, Jaya Kumar
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
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*
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* This work was made possible by help and equipment support from E-Ink
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* Corporation. http://support.eink.com/community
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*
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* This driver is written to be used with the Metronome display controller.
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* It was tested with an E-Ink 800x600 Vizplex EPD on a Gumstix Connex board
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* using the Lyre interface board.
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*
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* General notes:
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* - User must set metronomefb_enable=1 to enable it.
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* - See Documentation/fb/metronomefb.txt for how metronome works.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/list.h>
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#include <linux/firmware.h>
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#include <linux/dma-mapping.h>
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#include <linux/uaccess.h>
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#include <linux/irq.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/unaligned.h>
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#define DEBUG 1
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#ifdef DEBUG
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#define DPRINTK(f, a...) printk(KERN_DEBUG "%s: " f, __func__ , ## a)
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#else
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#define DPRINTK(f, a...)
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#endif
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/* Display specific information */
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#define DPY_W 832
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#define DPY_H 622
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struct metromem_desc {
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u32 mFDADR0;
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u32 mFSADR0;
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u32 mFIDR0;
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u32 mLDCMD0;
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};
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struct metromem_cmd {
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u16 opcode;
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u16 args[((64-2)/2)];
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u16 csum;
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};
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struct metronomefb_par {
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unsigned char *metromem;
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struct metromem_desc *metromem_desc;
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struct metromem_cmd *metromem_cmd;
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unsigned char *metromem_wfm;
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unsigned char *metromem_img;
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u16 *metromem_img_csum;
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u16 *csum_table;
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int metromemsize;
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dma_addr_t metromem_dma;
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dma_addr_t metromem_desc_dma;
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struct fb_info *info;
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wait_queue_head_t waitq;
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u8 frame_count;
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};
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/* frame differs from image. frame includes non-visible pixels */
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struct epd_frame {
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int fw; /* frame width */
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int fh; /* frame height */
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};
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static struct epd_frame epd_frame_table[] = {
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{
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.fw = 832,
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.fh = 622
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},
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};
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static struct fb_fix_screeninfo metronomefb_fix __devinitdata = {
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.id = "metronomefb",
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_STATIC_PSEUDOCOLOR,
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.xpanstep = 0,
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.ypanstep = 0,
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.ywrapstep = 0,
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.line_length = DPY_W,
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.accel = FB_ACCEL_NONE,
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};
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static struct fb_var_screeninfo metronomefb_var __devinitdata = {
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.xres = DPY_W,
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.yres = DPY_H,
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.xres_virtual = DPY_W,
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.yres_virtual = DPY_H,
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.bits_per_pixel = 8,
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.grayscale = 1,
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.nonstd = 1,
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.red = { 4, 3, 0 },
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.green = { 0, 0, 0 },
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.blue = { 0, 0, 0 },
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.transp = { 0, 0, 0 },
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};
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static unsigned int metronomefb_enable;
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struct waveform_hdr {
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u8 stuff[32];
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u8 wmta[3];
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u8 fvsn;
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u8 luts;
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u8 mc;
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u8 trc;
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u8 stuff3;
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u8 endb;
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u8 swtb;
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u8 stuff2a[2];
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u8 stuff2b[3];
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u8 wfm_cs;
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} __attribute__ ((packed));
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/* main metronomefb functions */
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static u8 calc_cksum(int start, int end, u8 *mem)
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{
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u8 tmp = 0;
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int i;
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for (i = start; i < end; i++)
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tmp += mem[i];
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return tmp;
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}
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static u16 calc_img_cksum(u16 *start, int length)
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{
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u16 tmp = 0;
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while (length--)
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tmp += *start++;
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return tmp;
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}
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/* here we decode the incoming waveform file and populate metromem */
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#define EXP_WFORM_SIZE 47001
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static int load_waveform(u8 *mem, size_t size, u8 *metromem, int m, int t,
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u8 *frame_count)
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{
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int tta;
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int wmta;
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int trn = 0;
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int i;
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unsigned char v;
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u8 cksum;
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int cksum_idx;
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int wfm_idx, owfm_idx;
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int mem_idx = 0;
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struct waveform_hdr *wfm_hdr;
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if (size != EXP_WFORM_SIZE) {
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printk(KERN_ERR "Error: unexpected size %d != %d\n", size,
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EXP_WFORM_SIZE);
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return -EINVAL;
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}
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wfm_hdr = (struct waveform_hdr *) mem;
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if (wfm_hdr->fvsn != 1) {
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printk(KERN_ERR "Error: bad fvsn %x\n", wfm_hdr->fvsn);
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return -EINVAL;
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}
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if (wfm_hdr->luts != 0) {
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printk(KERN_ERR "Error: bad luts %x\n", wfm_hdr->luts);
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return -EINVAL;
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}
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cksum = calc_cksum(32, 47, mem);
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if (cksum != wfm_hdr->wfm_cs) {
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printk(KERN_ERR "Error: bad cksum %x != %x\n", cksum,
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wfm_hdr->wfm_cs);
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return -EINVAL;
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}
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wfm_hdr->mc += 1;
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wfm_hdr->trc += 1;
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for (i = 0; i < 5; i++) {
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if (*(wfm_hdr->stuff2a + i) != 0) {
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printk(KERN_ERR "Error: unexpected value in padding\n");
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return -EINVAL;
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}
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}
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/* calculating trn. trn is something used to index into
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the waveform. presumably selecting the right one for the
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desired temperature. it works out the offset of the first
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v that exceeds the specified temperature */
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if ((sizeof(*wfm_hdr) + wfm_hdr->trc) > size)
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return -EINVAL;
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for (i = sizeof(*wfm_hdr); i <= sizeof(*wfm_hdr) + wfm_hdr->trc; i++) {
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if (mem[i] > t) {
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trn = i - sizeof(*wfm_hdr) - 1;
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break;
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}
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}
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/* check temperature range table checksum */
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cksum_idx = sizeof(*wfm_hdr) + wfm_hdr->trc + 1;
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if (cksum_idx > size)
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return -EINVAL;
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cksum = calc_cksum(sizeof(*wfm_hdr), cksum_idx, mem);
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if (cksum != mem[cksum_idx]) {
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printk(KERN_ERR "Error: bad temperature range table cksum"
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" %x != %x\n", cksum, mem[cksum_idx]);
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return -EINVAL;
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}
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/* check waveform mode table address checksum */
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wmta = le32_to_cpu(get_unaligned((__le32 *) wfm_hdr->wmta));
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wmta &= 0x00FFFFFF;
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cksum_idx = wmta + m*4 + 3;
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if (cksum_idx > size)
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return -EINVAL;
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cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
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if (cksum != mem[cksum_idx]) {
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printk(KERN_ERR "Error: bad mode table address cksum"
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" %x != %x\n", cksum, mem[cksum_idx]);
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return -EINVAL;
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}
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/* check waveform temperature table address checksum */
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tta = le32_to_cpu(get_unaligned((int *) (mem + wmta + m*4)));
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tta &= 0x00FFFFFF;
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cksum_idx = tta + trn*4 + 3;
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if (cksum_idx > size)
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return -EINVAL;
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cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem);
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if (cksum != mem[cksum_idx]) {
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printk(KERN_ERR "Error: bad temperature table address cksum"
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" %x != %x\n", cksum, mem[cksum_idx]);
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return -EINVAL;
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}
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/* here we do the real work of putting the waveform into the
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metromem buffer. this does runlength decoding of the waveform */
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wfm_idx = le32_to_cpu(get_unaligned((__le32 *) (mem + tta + trn*4)));
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wfm_idx &= 0x00FFFFFF;
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owfm_idx = wfm_idx;
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if (wfm_idx > size)
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return -EINVAL;
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while (wfm_idx < size) {
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unsigned char rl;
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v = mem[wfm_idx++];
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if (v == wfm_hdr->swtb) {
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while (((v = mem[wfm_idx++]) != wfm_hdr->swtb) &&
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wfm_idx < size)
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metromem[mem_idx++] = v;
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continue;
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}
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if (v == wfm_hdr->endb)
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break;
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rl = mem[wfm_idx++];
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for (i = 0; i <= rl; i++)
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metromem[mem_idx++] = v;
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}
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cksum_idx = wfm_idx;
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if (cksum_idx > size)
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return -EINVAL;
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cksum = calc_cksum(owfm_idx, cksum_idx, mem);
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if (cksum != mem[cksum_idx]) {
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printk(KERN_ERR "Error: bad waveform data cksum"
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" %x != %x\n", cksum, mem[cksum_idx]);
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return -EINVAL;
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}
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*frame_count = (mem_idx/64);
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return 0;
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}
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/* register offsets for gpio control */
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#define LED_GPIO_PIN 51
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#define STDBY_GPIO_PIN 48
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#define RST_GPIO_PIN 49
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#define RDY_GPIO_PIN 32
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#define ERR_GPIO_PIN 17
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#define PCBPWR_GPIO_PIN 16
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#define AF_SEL_GPIO_N 0x3
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#define GAFR0_U_OFFSET(pin) ((pin - 16) * 2)
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#define GAFR1_L_OFFSET(pin) ((pin - 32) * 2)
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#define GAFR1_U_OFFSET(pin) ((pin - 48) * 2)
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#define GPDR1_OFFSET(pin) (pin - 32)
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#define GPCR1_OFFSET(pin) (pin - 32)
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#define GPSR1_OFFSET(pin) (pin - 32)
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#define GPCR0_OFFSET(pin) (pin)
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#define GPSR0_OFFSET(pin) (pin)
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static void metronome_set_gpio_output(int pin, int val)
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{
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u8 index;
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index = pin >> 4;
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switch (index) {
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case 1:
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if (val)
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GPSR0 |= (1 << GPSR0_OFFSET(pin));
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else
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GPCR0 |= (1 << GPCR0_OFFSET(pin));
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break;
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case 2:
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break;
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case 3:
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if (val)
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GPSR1 |= (1 << GPSR1_OFFSET(pin));
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else
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GPCR1 |= (1 << GPCR1_OFFSET(pin));
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break;
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default:
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printk(KERN_ERR "unimplemented\n");
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}
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}
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static void __devinit metronome_init_gpio_pin(int pin, int dir)
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{
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u8 index;
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/* dir 0 is output, 1 is input
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- do 2 things here:
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- set gpio alternate function to standard gpio
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- set gpio direction to input or output */
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index = pin >> 4;
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switch (index) {
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case 1:
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GAFR0_U &= ~(AF_SEL_GPIO_N << GAFR0_U_OFFSET(pin));
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if (dir)
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GPDR0 &= ~(1 << pin);
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else
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GPDR0 |= (1 << pin);
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break;
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case 2:
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GAFR1_L &= ~(AF_SEL_GPIO_N << GAFR1_L_OFFSET(pin));
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if (dir)
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GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
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else
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GPDR1 |= (1 << GPDR1_OFFSET(pin));
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break;
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case 3:
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GAFR1_U &= ~(AF_SEL_GPIO_N << GAFR1_U_OFFSET(pin));
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if (dir)
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GPDR1 &= ~(1 << GPDR1_OFFSET(pin));
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else
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GPDR1 |= (1 << GPDR1_OFFSET(pin));
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break;
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default:
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printk(KERN_ERR "unimplemented\n");
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}
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}
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static void __devinit metronome_init_gpio_regs(void)
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{
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metronome_init_gpio_pin(LED_GPIO_PIN, 0);
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metronome_set_gpio_output(LED_GPIO_PIN, 0);
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metronome_init_gpio_pin(STDBY_GPIO_PIN, 0);
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metronome_set_gpio_output(STDBY_GPIO_PIN, 0);
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metronome_init_gpio_pin(RST_GPIO_PIN, 0);
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metronome_set_gpio_output(RST_GPIO_PIN, 0);
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metronome_init_gpio_pin(RDY_GPIO_PIN, 1);
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metronome_init_gpio_pin(ERR_GPIO_PIN, 1);
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metronome_init_gpio_pin(PCBPWR_GPIO_PIN, 0);
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metronome_set_gpio_output(PCBPWR_GPIO_PIN, 0);
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}
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static void metronome_disable_lcd_controller(struct metronomefb_par *par)
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{
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LCSR = 0xffffffff; /* Clear LCD Status Register */
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LCCR0 |= LCCR0_DIS; /* Disable LCD Controller */
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/* we reset and just wait for things to settle */
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msleep(200);
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}
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static void metronome_enable_lcd_controller(struct metronomefb_par *par)
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{
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LCSR = 0xffffffff;
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FDADR0 = par->metromem_desc_dma;
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LCCR0 |= LCCR0_ENB;
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}
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static void __devinit metronome_init_lcdc_regs(struct metronomefb_par *par)
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{
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/* here we do:
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- disable the lcd controller
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- setup lcd control registers
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- setup dma descriptor
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- reenable lcd controller
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*/
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/* disable the lcd controller */
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metronome_disable_lcd_controller(par);
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/* setup lcd control registers */
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LCCR0 = LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | LCCR0_PAS
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| LCCR0_QDM | LCCR0_BM | LCCR0_OUM;
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LCCR1 = (epd_frame_table[0].fw/2 - 1) /* pixels per line */
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| (27 << 10) /* hsync pulse width - 1 */
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| (33 << 16) /* eol pixel count */
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| (33 << 24); /* bol pixel count */
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LCCR2 = (epd_frame_table[0].fh - 1) /* lines per panel */
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| (24 << 10) /* vsync pulse width - 1 */
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| (2 << 16) /* eof pixel count */
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| (0 << 24); /* bof pixel count */
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LCCR3 = 2 /* pixel clock divisor */
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| (24 << 8) /* AC Bias pin freq */
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| LCCR3_16BPP /* BPP */
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| LCCR3_PCP; /* PCP falling edge */
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/* setup dma descriptor */
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par->metromem_desc->mFDADR0 = par->metromem_desc_dma;
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par->metromem_desc->mFSADR0 = par->metromem_dma;
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par->metromem_desc->mFIDR0 = 0;
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par->metromem_desc->mLDCMD0 = epd_frame_table[0].fw
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* epd_frame_table[0].fh;
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/* reenable lcd controller */
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metronome_enable_lcd_controller(par);
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}
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static int metronome_display_cmd(struct metronomefb_par *par)
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{
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int i;
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u16 cs;
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u16 opcode;
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static u8 borderval;
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u8 *ptr;
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/* setup display command
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we can't immediately set the opcode since the controller
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will try parse the command before we've set it all up
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so we just set cs here and set the opcode at the end */
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ptr = par->metromem;
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if (par->metromem_cmd->opcode == 0xCC40)
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opcode = cs = 0xCC41;
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else
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opcode = cs = 0xCC40;
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/* set the args ( 2 bytes ) for display */
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i = 0;
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par->metromem_cmd->args[i] = 1 << 3 /* border update */
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| ((borderval++ % 4) & 0x0F) << 4
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| (par->frame_count - 1) << 8;
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cs += par->metromem_cmd->args[i++];
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/* the rest are 0 */
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memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
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par->metromem_cmd->csum = cs;
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par->metromem_cmd->opcode = opcode; /* display cmd */
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i = wait_event_interruptible_timeout(par->waitq, (GPLR1 & 0x01), HZ);
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return i;
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}
|
|
|
|
static int __devinit metronome_powerup_cmd(struct metronomefb_par *par)
|
|
{
|
|
int i;
|
|
u16 cs;
|
|
|
|
/* setup power up command */
|
|
par->metromem_cmd->opcode = 0x1234; /* pwr up pseudo cmd */
|
|
cs = par->metromem_cmd->opcode;
|
|
|
|
/* set pwr1,2,3 to 1024 */
|
|
for (i = 0; i < 3; i++) {
|
|
par->metromem_cmd->args[i] = 1024;
|
|
cs += par->metromem_cmd->args[i];
|
|
}
|
|
|
|
/* the rest are 0 */
|
|
memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
|
|
|
|
par->metromem_cmd->csum = cs;
|
|
|
|
msleep(1);
|
|
metronome_set_gpio_output(RST_GPIO_PIN, 1);
|
|
|
|
msleep(1);
|
|
metronome_set_gpio_output(STDBY_GPIO_PIN, 1);
|
|
|
|
i = wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
|
|
return i;
|
|
}
|
|
|
|
static int __devinit metronome_config_cmd(struct metronomefb_par *par)
|
|
{
|
|
int i;
|
|
u16 cs;
|
|
|
|
/* setup config command
|
|
we can't immediately set the opcode since the controller
|
|
will try parse the command before we've set it all up
|
|
so we just set cs here and set the opcode at the end */
|
|
|
|
cs = 0xCC10;
|
|
|
|
/* set the 12 args ( 8 bytes ) for config. see spec for meanings */
|
|
i = 0;
|
|
par->metromem_cmd->args[i] = 15 /* sdlew */
|
|
| 2 << 8 /* sdosz */
|
|
| 0 << 11 /* sdor */
|
|
| 0 << 12 /* sdces */
|
|
| 0 << 15; /* sdcer */
|
|
cs += par->metromem_cmd->args[i++];
|
|
|
|
par->metromem_cmd->args[i] = 42 /* gdspl */
|
|
| 1 << 8 /* gdr1 */
|
|
| 1 << 9 /* sdshr */
|
|
| 0 << 15; /* gdspp */
|
|
cs += par->metromem_cmd->args[i++];
|
|
|
|
par->metromem_cmd->args[i] = 18 /* gdspw */
|
|
| 0 << 15; /* dispc */
|
|
cs += par->metromem_cmd->args[i++];
|
|
|
|
par->metromem_cmd->args[i] = 599 /* vdlc */
|
|
| 0 << 11 /* dsi */
|
|
| 0 << 12; /* dsic */
|
|
cs += par->metromem_cmd->args[i++];
|
|
|
|
/* the rest are 0 */
|
|
memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
|
|
|
|
par->metromem_cmd->csum = cs;
|
|
par->metromem_cmd->opcode = 0xCC10; /* config cmd */
|
|
|
|
i = wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
|
|
return i;
|
|
}
|
|
|
|
static int __devinit metronome_init_cmd(struct metronomefb_par *par)
|
|
{
|
|
int i;
|
|
u16 cs;
|
|
|
|
/* setup init command
|
|
we can't immediately set the opcode since the controller
|
|
will try parse the command before we've set it all up
|
|
so we just set cs here and set the opcode at the end */
|
|
|
|
cs = 0xCC20;
|
|
|
|
/* set the args ( 2 bytes ) for init */
|
|
i = 0;
|
|
par->metromem_cmd->args[i] = 0;
|
|
cs += par->metromem_cmd->args[i++];
|
|
|
|
/* the rest are 0 */
|
|
memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2);
|
|
|
|
par->metromem_cmd->csum = cs;
|
|
par->metromem_cmd->opcode = 0xCC20; /* init cmd */
|
|
|
|
i = wait_event_timeout(par->waitq, (GPLR1 & 0x01), HZ);
|
|
return i;
|
|
}
|
|
|
|
static int __devinit metronome_init_regs(struct metronomefb_par *par)
|
|
{
|
|
int res;
|
|
|
|
metronome_init_gpio_regs();
|
|
metronome_init_lcdc_regs(par);
|
|
|
|
res = metronome_powerup_cmd(par);
|
|
if (res)
|
|
return res;
|
|
|
|
res = metronome_config_cmd(par);
|
|
if (res)
|
|
return res;
|
|
|
|
res = metronome_init_cmd(par);
|
|
if (res)
|
|
return res;
|
|
|
|
return res;
|
|
}
|
|
|
|
static void metronomefb_dpy_update(struct metronomefb_par *par)
|
|
{
|
|
u16 cksum;
|
|
unsigned char *buf = (unsigned char __force *)par->info->screen_base;
|
|
|
|
/* copy from vm to metromem */
|
|
memcpy(par->metromem_img, buf, DPY_W*DPY_H);
|
|
|
|
cksum = calc_img_cksum((u16 *) par->metromem_img,
|
|
(epd_frame_table[0].fw * DPY_H)/2);
|
|
*((u16 *) (par->metromem_img) +
|
|
(epd_frame_table[0].fw * DPY_H)/2) = cksum;
|
|
metronome_display_cmd(par);
|
|
}
|
|
|
|
static u16 metronomefb_dpy_update_page(struct metronomefb_par *par, int index)
|
|
{
|
|
int i;
|
|
u16 csum = 0;
|
|
u16 *buf = (u16 __force *) (par->info->screen_base + index);
|
|
u16 *img = (u16 *) (par->metromem_img + index);
|
|
|
|
/* swizzle from vm to metromem and recalc cksum at the same time*/
|
|
for (i = 0; i < PAGE_SIZE/2; i++) {
|
|
*(img + i) = (buf[i] << 5) & 0xE0E0;
|
|
csum += *(img + i);
|
|
}
|
|
return csum;
|
|
}
|
|
|
|
/* this is called back from the deferred io workqueue */
|
|
static void metronomefb_dpy_deferred_io(struct fb_info *info,
|
|
struct list_head *pagelist)
|
|
{
|
|
u16 cksum;
|
|
struct page *cur;
|
|
struct fb_deferred_io *fbdefio = info->fbdefio;
|
|
struct metronomefb_par *par = info->par;
|
|
|
|
/* walk the written page list and swizzle the data */
|
|
list_for_each_entry(cur, &fbdefio->pagelist, lru) {
|
|
cksum = metronomefb_dpy_update_page(par,
|
|
(cur->index << PAGE_SHIFT));
|
|
par->metromem_img_csum -= par->csum_table[cur->index];
|
|
par->csum_table[cur->index] = cksum;
|
|
par->metromem_img_csum += cksum;
|
|
}
|
|
|
|
metronome_display_cmd(par);
|
|
}
|
|
|
|
static void metronomefb_fillrect(struct fb_info *info,
|
|
const struct fb_fillrect *rect)
|
|
{
|
|
struct metronomefb_par *par = info->par;
|
|
|
|
sys_fillrect(info, rect);
|
|
metronomefb_dpy_update(par);
|
|
}
|
|
|
|
static void metronomefb_copyarea(struct fb_info *info,
|
|
const struct fb_copyarea *area)
|
|
{
|
|
struct metronomefb_par *par = info->par;
|
|
|
|
sys_copyarea(info, area);
|
|
metronomefb_dpy_update(par);
|
|
}
|
|
|
|
static void metronomefb_imageblit(struct fb_info *info,
|
|
const struct fb_image *image)
|
|
{
|
|
struct metronomefb_par *par = info->par;
|
|
|
|
sys_imageblit(info, image);
|
|
metronomefb_dpy_update(par);
|
|
}
|
|
|
|
/*
|
|
* this is the slow path from userspace. they can seek and write to
|
|
* the fb. it is based on fb_sys_write
|
|
*/
|
|
static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct metronomefb_par *par = info->par;
|
|
unsigned long p = *ppos;
|
|
void *dst;
|
|
int err = 0;
|
|
unsigned long total_size;
|
|
|
|
if (info->state != FBINFO_STATE_RUNNING)
|
|
return -EPERM;
|
|
|
|
total_size = info->fix.smem_len;
|
|
|
|
if (p > total_size)
|
|
return -EFBIG;
|
|
|
|
if (count > total_size) {
|
|
err = -EFBIG;
|
|
count = total_size;
|
|
}
|
|
|
|
if (count + p > total_size) {
|
|
if (!err)
|
|
err = -ENOSPC;
|
|
|
|
count = total_size - p;
|
|
}
|
|
|
|
dst = (void __force *) (info->screen_base + p);
|
|
|
|
if (copy_from_user(dst, buf, count))
|
|
err = -EFAULT;
|
|
|
|
if (!err)
|
|
*ppos += count;
|
|
|
|
metronomefb_dpy_update(par);
|
|
|
|
return (err) ? err : count;
|
|
}
|
|
|
|
static struct fb_ops metronomefb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_write = metronomefb_write,
|
|
.fb_fillrect = metronomefb_fillrect,
|
|
.fb_copyarea = metronomefb_copyarea,
|
|
.fb_imageblit = metronomefb_imageblit,
|
|
};
|
|
|
|
static struct fb_deferred_io metronomefb_defio = {
|
|
.delay = HZ,
|
|
.deferred_io = metronomefb_dpy_deferred_io,
|
|
};
|
|
|
|
static irqreturn_t metronome_handle_irq(int irq, void *dev_id)
|
|
{
|
|
struct fb_info *info = dev_id;
|
|
struct metronomefb_par *par = info->par;
|
|
|
|
wake_up_interruptible(&par->waitq);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __devinit metronomefb_probe(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info;
|
|
int retval = -ENOMEM;
|
|
int videomemorysize;
|
|
unsigned char *videomemory;
|
|
struct metronomefb_par *par;
|
|
const struct firmware *fw_entry;
|
|
int cmd_size, wfm_size, img_size, padding_size, totalsize;
|
|
int i;
|
|
|
|
/* we have two blocks of memory.
|
|
info->screen_base which is vm, and is the fb used by apps.
|
|
par->metromem which is physically contiguous memory and
|
|
contains the display controller commands, waveform,
|
|
processed image data and padding. this is the data pulled
|
|
by the pxa255's LCD controller and pushed to Metronome */
|
|
|
|
videomemorysize = (DPY_W*DPY_H);
|
|
videomemory = vmalloc(videomemorysize);
|
|
if (!videomemory)
|
|
return retval;
|
|
|
|
memset(videomemory, 0, videomemorysize);
|
|
|
|
info = framebuffer_alloc(sizeof(struct metronomefb_par), &dev->dev);
|
|
if (!info)
|
|
goto err_vfree;
|
|
|
|
info->screen_base = (char __iomem *) videomemory;
|
|
info->fbops = &metronomefb_ops;
|
|
|
|
info->var = metronomefb_var;
|
|
info->fix = metronomefb_fix;
|
|
info->fix.smem_len = videomemorysize;
|
|
par = info->par;
|
|
par->info = info;
|
|
init_waitqueue_head(&par->waitq);
|
|
|
|
/* this table caches per page csum values. */
|
|
par->csum_table = vmalloc(videomemorysize/PAGE_SIZE);
|
|
if (!par->csum_table)
|
|
goto err_csum_table;
|
|
|
|
/* the metromem buffer is divided as follows:
|
|
command | CRC | padding
|
|
16kb waveform data | CRC | padding
|
|
image data | CRC
|
|
and an extra 256 bytes for dma descriptors
|
|
eg: IW=832 IH=622 WS=128
|
|
*/
|
|
|
|
cmd_size = 1 * epd_frame_table[0].fw;
|
|
wfm_size = ((16*1024 + 2 + epd_frame_table[0].fw - 1)
|
|
/ epd_frame_table[0].fw) * epd_frame_table[0].fw;
|
|
img_size = epd_frame_table[0].fh * epd_frame_table[0].fw;
|
|
padding_size = 4 * epd_frame_table[0].fw;
|
|
totalsize = cmd_size + wfm_size + img_size + padding_size;
|
|
par->metromemsize = PAGE_ALIGN(totalsize + 256);
|
|
DPRINTK("desired memory size = %d\n", par->metromemsize);
|
|
dev->dev.coherent_dma_mask = 0xffffffffull;
|
|
par->metromem = dma_alloc_writecombine(&dev->dev, par->metromemsize,
|
|
&par->metromem_dma, GFP_KERNEL);
|
|
if (!par->metromem) {
|
|
printk(KERN_ERR
|
|
"metronomefb: unable to allocate dma buffer\n");
|
|
goto err_vfree;
|
|
}
|
|
|
|
info->fix.smem_start = par->metromem_dma;
|
|
par->metromem_cmd = (struct metromem_cmd *) par->metromem;
|
|
par->metromem_wfm = par->metromem + cmd_size;
|
|
par->metromem_img = par->metromem + cmd_size + wfm_size;
|
|
par->metromem_img_csum = (u16 *) (par->metromem_img +
|
|
(epd_frame_table[0].fw * DPY_H));
|
|
DPRINTK("img offset=0x%x\n", cmd_size + wfm_size);
|
|
par->metromem_desc = (struct metromem_desc *) (par->metromem + cmd_size
|
|
+ wfm_size + img_size + padding_size);
|
|
par->metromem_desc_dma = par->metromem_dma + cmd_size + wfm_size
|
|
+ img_size + padding_size;
|
|
|
|
/* load the waveform in. assume mode 3, temp 31 for now */
|
|
/* a) request the waveform file from userspace
|
|
b) process waveform and decode into metromem */
|
|
|
|
retval = request_firmware(&fw_entry, "waveform.wbf", &dev->dev);
|
|
if (retval < 0) {
|
|
printk(KERN_ERR "metronomefb: couldn't get waveform\n");
|
|
goto err_dma_free;
|
|
}
|
|
|
|
retval = load_waveform((u8 *) fw_entry->data, fw_entry->size,
|
|
par->metromem_wfm, 3, 31, &par->frame_count);
|
|
if (retval < 0) {
|
|
printk(KERN_ERR "metronomefb: couldn't process waveform\n");
|
|
goto err_ld_wfm;
|
|
}
|
|
release_firmware(fw_entry);
|
|
|
|
retval = request_irq(IRQ_GPIO(RDY_GPIO_PIN), metronome_handle_irq,
|
|
IRQF_DISABLED, "Metronome", info);
|
|
if (retval) {
|
|
dev_err(&dev->dev, "request_irq failed: %d\n", retval);
|
|
goto err_ld_wfm;
|
|
}
|
|
set_irq_type(IRQ_GPIO(RDY_GPIO_PIN), IRQT_FALLING);
|
|
|
|
retval = metronome_init_regs(par);
|
|
if (retval < 0)
|
|
goto err_free_irq;
|
|
|
|
info->flags = FBINFO_FLAG_DEFAULT;
|
|
|
|
info->fbdefio = &metronomefb_defio;
|
|
fb_deferred_io_init(info);
|
|
|
|
retval = fb_alloc_cmap(&info->cmap, 8, 0);
|
|
if (retval < 0) {
|
|
printk(KERN_ERR "Failed to allocate colormap\n");
|
|
goto err_fb_rel;
|
|
}
|
|
|
|
/* set cmap */
|
|
for (i = 0; i < 8; i++)
|
|
info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/16;
|
|
memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8);
|
|
memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8);
|
|
|
|
retval = register_framebuffer(info);
|
|
if (retval < 0)
|
|
goto err_cmap;
|
|
|
|
platform_set_drvdata(dev, info);
|
|
|
|
printk(KERN_INFO
|
|
"fb%d: Metronome frame buffer device, using %dK of video"
|
|
" memory\n", info->node, videomemorysize >> 10);
|
|
|
|
return 0;
|
|
|
|
err_cmap:
|
|
fb_dealloc_cmap(&info->cmap);
|
|
err_fb_rel:
|
|
framebuffer_release(info);
|
|
err_free_irq:
|
|
free_irq(IRQ_GPIO(RDY_GPIO_PIN), info);
|
|
err_ld_wfm:
|
|
release_firmware(fw_entry);
|
|
err_dma_free:
|
|
dma_free_writecombine(&dev->dev, par->metromemsize, par->metromem,
|
|
par->metromem_dma);
|
|
err_csum_table:
|
|
vfree(par->csum_table);
|
|
err_vfree:
|
|
vfree(videomemory);
|
|
return retval;
|
|
}
|
|
|
|
static int __devexit metronomefb_remove(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
|
|
|
if (info) {
|
|
struct metronomefb_par *par = info->par;
|
|
fb_deferred_io_cleanup(info);
|
|
dma_free_writecombine(&dev->dev, par->metromemsize,
|
|
par->metromem, par->metromem_dma);
|
|
fb_dealloc_cmap(&info->cmap);
|
|
vfree(par->csum_table);
|
|
unregister_framebuffer(info);
|
|
vfree((void __force *)info->screen_base);
|
|
free_irq(IRQ_GPIO(RDY_GPIO_PIN), info);
|
|
framebuffer_release(info);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver metronomefb_driver = {
|
|
.probe = metronomefb_probe,
|
|
.remove = metronomefb_remove,
|
|
.driver = {
|
|
.name = "metronomefb",
|
|
},
|
|
};
|
|
|
|
static struct platform_device *metronomefb_device;
|
|
|
|
static int __init metronomefb_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (!metronomefb_enable) {
|
|
printk(KERN_ERR
|
|
"Use metronomefb_enable to enable the device\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
ret = platform_driver_register(&metronomefb_driver);
|
|
if (!ret) {
|
|
metronomefb_device = platform_device_alloc("metronomefb", 0);
|
|
if (metronomefb_device)
|
|
ret = platform_device_add(metronomefb_device);
|
|
else
|
|
ret = -ENOMEM;
|
|
|
|
if (ret) {
|
|
platform_device_put(metronomefb_device);
|
|
platform_driver_unregister(&metronomefb_driver);
|
|
}
|
|
}
|
|
return ret;
|
|
|
|
}
|
|
|
|
static void __exit metronomefb_exit(void)
|
|
{
|
|
platform_device_unregister(metronomefb_device);
|
|
platform_driver_unregister(&metronomefb_driver);
|
|
}
|
|
|
|
module_param(metronomefb_enable, uint, 0);
|
|
MODULE_PARM_DESC(metronomefb_enable, "Enable communication with Metronome");
|
|
|
|
module_init(metronomefb_init);
|
|
module_exit(metronomefb_exit);
|
|
|
|
MODULE_DESCRIPTION("fbdev driver for Metronome controller");
|
|
MODULE_AUTHOR("Jaya Kumar");
|
|
MODULE_LICENSE("GPL");
|