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kernel-ark/arch/arm/mach-mv78xx0/common.c
Robin Holt 7b6d864b48 reboot: arm: change reboot_mode to use enum reboot_mode 
Preparing to move the parsing of reboot= to generic kernel code forces
the change in reboot_mode handling to use the enum.

[akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:29 -07:00

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/*
* arch/arm/mach-mv78xx0/common.c
*
* Core functions for Marvell MV78xx0 SoCs
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/ata_platform.h>
#include <linux/clk-provider.h>
#include <linux/ethtool.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <mach/mv78xx0.h>
#include <mach/bridge-regs.h>
#include <plat/cache-feroceon-l2.h>
#include <linux/platform_data/usb-ehci-orion.h>
#include <linux/platform_data/mtd-orion_nand.h>
#include <plat/time.h>
#include <plat/common.h>
#include <plat/addr-map.h>
#include "common.h"
static int get_tclk(void);
/*****************************************************************************
* Common bits
****************************************************************************/
int mv78xx0_core_index(void)
{
u32 extra;
/*
* Read Extra Features register.
*/
__asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (extra));
return !!(extra & 0x00004000);
}
static int get_hclk(void)
{
int hclk;
/*
* HCLK tick rate is configured by DEV_D[7:5] pins.
*/
switch ((readl(SAMPLE_AT_RESET_LOW) >> 5) & 7) {
case 0:
hclk = 166666667;
break;
case 1:
hclk = 200000000;
break;
case 2:
hclk = 266666667;
break;
case 3:
hclk = 333333333;
break;
case 4:
hclk = 400000000;
break;
default:
panic("unknown HCLK PLL setting: %.8x\n",
readl(SAMPLE_AT_RESET_LOW));
}
return hclk;
}
static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk)
{
u32 cfg;
/*
* Core #0 PCLK/L2CLK is configured by bits [13:8], core #1
* PCLK/L2CLK by bits [19:14].
*/
if (core_index == 0) {
cfg = (readl(SAMPLE_AT_RESET_LOW) >> 8) & 0x3f;
} else {
cfg = (readl(SAMPLE_AT_RESET_LOW) >> 14) & 0x3f;
}
/*
* Bits [11:8] ([17:14] for core #1) configure the PCLK:HCLK
* ratio (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6).
*/
*pclk = ((u64)hclk * (2 + (cfg & 0xf))) >> 1;
/*
* Bits [13:12] ([19:18] for core #1) configure the PCLK:L2CLK
* ratio (1, 2, 3).
*/
*l2clk = *pclk / (((cfg >> 4) & 3) + 1);
}
static int get_tclk(void)
{
int tclk_freq;
/*
* TCLK tick rate is configured by DEV_A[2:0] strap pins.
*/
switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) {
case 1:
tclk_freq = 166666667;
break;
case 3:
tclk_freq = 200000000;
break;
default:
panic("unknown TCLK PLL setting: %.8x\n",
readl(SAMPLE_AT_RESET_HIGH));
}
return tclk_freq;
}
/*****************************************************************************
* I/O Address Mapping
****************************************************************************/
static struct map_desc mv78xx0_io_desc[] __initdata = {
{
.virtual = (unsigned long) MV78XX0_CORE_REGS_VIRT_BASE,
.pfn = 0,
.length = MV78XX0_CORE_REGS_SIZE,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long) MV78XX0_REGS_VIRT_BASE,
.pfn = __phys_to_pfn(MV78XX0_REGS_PHYS_BASE),
.length = MV78XX0_REGS_SIZE,
.type = MT_DEVICE,
},
};
void __init mv78xx0_map_io(void)
{
unsigned long phys;
/*
* Map the right set of per-core registers depending on
* which core we are running on.
*/
if (mv78xx0_core_index() == 0) {
phys = MV78XX0_CORE0_REGS_PHYS_BASE;
} else {
phys = MV78XX0_CORE1_REGS_PHYS_BASE;
}
mv78xx0_io_desc[0].pfn = __phys_to_pfn(phys);
iotable_init(mv78xx0_io_desc, ARRAY_SIZE(mv78xx0_io_desc));
}
/*****************************************************************************
* CLK tree
****************************************************************************/
static struct clk *tclk;
static void __init clk_init(void)
{
tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT,
get_tclk());
orion_clkdev_init(tclk);
}
/*****************************************************************************
* EHCI
****************************************************************************/
void __init mv78xx0_ehci0_init(void)
{
orion_ehci_init(USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA);
}
/*****************************************************************************
* EHCI1
****************************************************************************/
void __init mv78xx0_ehci1_init(void)
{
orion_ehci_1_init(USB1_PHYS_BASE, IRQ_MV78XX0_USB_1);
}
/*****************************************************************************
* EHCI2
****************************************************************************/
void __init mv78xx0_ehci2_init(void)
{
orion_ehci_2_init(USB2_PHYS_BASE, IRQ_MV78XX0_USB_2);
}
/*****************************************************************************
* GE00
****************************************************************************/
void __init mv78xx0_ge00_init(struct mv643xx_eth_platform_data *eth_data)
{
orion_ge00_init(eth_data,
GE00_PHYS_BASE, IRQ_MV78XX0_GE00_SUM,
IRQ_MV78XX0_GE_ERR,
MV643XX_TX_CSUM_DEFAULT_LIMIT);
}
/*****************************************************************************
* GE01
****************************************************************************/
void __init mv78xx0_ge01_init(struct mv643xx_eth_platform_data *eth_data)
{
orion_ge01_init(eth_data,
GE01_PHYS_BASE, IRQ_MV78XX0_GE01_SUM,
NO_IRQ,
MV643XX_TX_CSUM_DEFAULT_LIMIT);
}
/*****************************************************************************
* GE10
****************************************************************************/
void __init mv78xx0_ge10_init(struct mv643xx_eth_platform_data *eth_data)
{
u32 dev, rev;
/*
* On the Z0, ge10 and ge11 are internally connected back
* to back, and not brought out.
*/
mv78xx0_pcie_id(&dev, &rev);
if (dev == MV78X00_Z0_DEV_ID) {
eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
eth_data->speed = SPEED_1000;
eth_data->duplex = DUPLEX_FULL;
}
orion_ge10_init(eth_data,
GE10_PHYS_BASE, IRQ_MV78XX0_GE10_SUM,
NO_IRQ);
}
/*****************************************************************************
* GE11
****************************************************************************/
void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data)
{
u32 dev, rev;
/*
* On the Z0, ge10 and ge11 are internally connected back
* to back, and not brought out.
*/
mv78xx0_pcie_id(&dev, &rev);
if (dev == MV78X00_Z0_DEV_ID) {
eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
eth_data->speed = SPEED_1000;
eth_data->duplex = DUPLEX_FULL;
}
orion_ge11_init(eth_data,
GE11_PHYS_BASE, IRQ_MV78XX0_GE11_SUM,
NO_IRQ);
}
/*****************************************************************************
* I2C
****************************************************************************/
void __init mv78xx0_i2c_init(void)
{
orion_i2c_init(I2C_0_PHYS_BASE, IRQ_MV78XX0_I2C_0, 8);
orion_i2c_1_init(I2C_1_PHYS_BASE, IRQ_MV78XX0_I2C_1, 8);
}
/*****************************************************************************
* SATA
****************************************************************************/
void __init mv78xx0_sata_init(struct mv_sata_platform_data *sata_data)
{
orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_MV78XX0_SATA);
}
/*****************************************************************************
* UART0
****************************************************************************/
void __init mv78xx0_uart0_init(void)
{
orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
IRQ_MV78XX0_UART_0, tclk);
}
/*****************************************************************************
* UART1
****************************************************************************/
void __init mv78xx0_uart1_init(void)
{
orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
IRQ_MV78XX0_UART_1, tclk);
}
/*****************************************************************************
* UART2
****************************************************************************/
void __init mv78xx0_uart2_init(void)
{
orion_uart2_init(UART2_VIRT_BASE, UART2_PHYS_BASE,
IRQ_MV78XX0_UART_2, tclk);
}
/*****************************************************************************
* UART3
****************************************************************************/
void __init mv78xx0_uart3_init(void)
{
orion_uart3_init(UART3_VIRT_BASE, UART3_PHYS_BASE,
IRQ_MV78XX0_UART_3, tclk);
}
/*****************************************************************************
* Time handling
****************************************************************************/
void __init mv78xx0_init_early(void)
{
orion_time_set_base(TIMER_VIRT_BASE);
if (mv78xx0_core_index() == 0)
mvebu_mbus_init("marvell,mv78xx0-mbus",
BRIDGE_WINS_CPU0_BASE, BRIDGE_WINS_SZ,
DDR_WINDOW_CPU0_BASE, DDR_WINDOW_CPU_SZ);
else
mvebu_mbus_init("marvell,mv78xx0-mbus",
BRIDGE_WINS_CPU1_BASE, BRIDGE_WINS_SZ,
DDR_WINDOW_CPU1_BASE, DDR_WINDOW_CPU_SZ);
}
void __init_refok mv78xx0_timer_init(void)
{
orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
IRQ_MV78XX0_TIMER_1, get_tclk());
}
/*****************************************************************************
* General
****************************************************************************/
static char * __init mv78xx0_id(void)
{
u32 dev, rev;
mv78xx0_pcie_id(&dev, &rev);
if (dev == MV78X00_Z0_DEV_ID) {
if (rev == MV78X00_REV_Z0)
return "MV78X00-Z0";
else
return "MV78X00-Rev-Unsupported";
} else if (dev == MV78100_DEV_ID) {
if (rev == MV78100_REV_A0)
return "MV78100-A0";
else if (rev == MV78100_REV_A1)
return "MV78100-A1";
else
return "MV78100-Rev-Unsupported";
} else if (dev == MV78200_DEV_ID) {
if (rev == MV78100_REV_A0)
return "MV78200-A0";
else
return "MV78200-Rev-Unsupported";
} else {
return "Device-Unknown";
}
}
static int __init is_l2_writethrough(void)
{
return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
}
void __init mv78xx0_init(void)
{
int core_index;
int hclk;
int pclk;
int l2clk;
core_index = mv78xx0_core_index();
hclk = get_hclk();
get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
printk(KERN_INFO "%s ", mv78xx0_id());
printk("core #%d, ", core_index);
printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);
#ifdef CONFIG_CACHE_FEROCEON_L2
feroceon_l2_init(is_l2_writethrough());
#endif
/* Setup root of clk tree */
clk_init();
}
void mv78xx0_restart(enum reboot_mode mode, const char *cmd)
{
/*
* Enable soft reset to assert RSTOUTn.
*/
writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
/*
* Assert soft reset.
*/
writel(SOFT_RESET, SYSTEM_SOFT_RESET);
while (1)
;
}
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