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linux/arch/arm/mach-omap/common.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

550 lines
15 KiB
C
Raw Blame History

/*
* linux/arch/arm/mach-omap/common.c
*
* Code common to all OMAP machines.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/console.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_8250.h>
#include <linux/serial_reg.h>
#include <asm/hardware.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>
#include <asm/hardware/clock.h>
#include <asm/io.h>
#include <asm/mach-types.h>
#include <asm/arch/board.h>
#include <asm/arch/mux.h>
#include <asm/arch/fpga.h>
#include "clock.h"
#define DEBUG 1
struct omap_id {
u16 jtag_id; /* Used to determine OMAP type */
u8 die_rev; /* Processor revision */
u32 omap_id; /* OMAP revision */
u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
};
/* Register values to detect the OMAP version */
static struct omap_id omap_ids[] __initdata = {
{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
};
/*
* Get OMAP type from PROD_ID.
* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
* Undocumented register in TEST BLOCK is used as fallback; This seems to
* work on 1510, 1610 & 1710. The official way hopefully will work in future
* processors.
*/
static u16 __init omap_get_jtag_id(void)
{
u32 prod_id, omap_id;
prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
omap_id = omap_readl(OMAP32_ID_1);
/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */
if (((prod_id >> 20) == 0) || (prod_id == omap_id))
prod_id = 0;
else
prod_id &= 0xffff;
if (prod_id)
return prod_id;
/* Use OMAP32_ID_1 as fallback */
prod_id = ((omap_id >> 12) & 0xffff);
return prod_id;
}
/*
* Get OMAP revision from DIE_REV.
* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
* Undocumented register in the TEST BLOCK is used as fallback.
* REVISIT: This does not seem to work on 1510
*/
static u8 __init omap_get_die_rev(void)
{
u32 die_rev;
die_rev = omap_readl(OMAP_DIE_ID_1);
/* Check for broken OMAP_DIE_ID on early 1710 */
if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
die_rev = 0;
die_rev = (die_rev >> 17) & 0xf;
if (die_rev)
return die_rev;
die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
return die_rev;
}
static void __init omap_check_revision(void)
{
int i;
u16 jtag_id;
u8 die_rev;
u32 omap_id;
u8 cpu_type;
jtag_id = omap_get_jtag_id();
die_rev = omap_get_die_rev();
omap_id = omap_readl(OMAP32_ID_0);
#ifdef DEBUG
printk("OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
printk("OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
omap_readl(OMAP_DIE_ID_1),
(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
printk("OMAP_PRODUCTION_ID_0: 0x%08x\n", omap_readl(OMAP_PRODUCTION_ID_0));
printk("OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
omap_readl(OMAP_PRODUCTION_ID_1),
omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
printk("OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
printk("OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
printk("JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
#endif
system_serial_high = omap_readl(OMAP_DIE_ID_0);
system_serial_low = omap_readl(OMAP_DIE_ID_1);
/* First check only the major version in a safe way */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (jtag_id == (omap_ids[i].jtag_id)) {
system_rev = omap_ids[i].type;
break;
}
}
/* Check if we can find the die revision */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
system_rev = omap_ids[i].type;
break;
}
}
/* Finally check also the omap_id */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (jtag_id == omap_ids[i].jtag_id
&& die_rev == omap_ids[i].die_rev
&& omap_id == omap_ids[i].omap_id) {
system_rev = omap_ids[i].type;
break;
}
}
/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
cpu_type = system_rev >> 24;
switch (cpu_type) {
case 0x07:
system_rev |= 0x07;
break;
case 0x15:
system_rev |= 0x15;
break;
case 0x16:
case 0x17:
system_rev |= 0x16;
break;
case 0x24:
system_rev |= 0x24;
break;
default:
printk("Unknown OMAP cpu type: 0x%02x\n", cpu_type);
}
printk("OMAP%04x", system_rev >> 16);
if ((system_rev >> 8) & 0xff)
printk("%x", (system_rev >> 8) & 0xff);
printk(" revision %i handled as %02xxx id: %08x%08x\n",
die_rev, system_rev & 0xff, system_serial_low,
system_serial_high);
}
/*
* ----------------------------------------------------------------------------
* OMAP I/O mapping
*
* The machine specific code may provide the extra mapping besides the
* default mapping provided here.
* ----------------------------------------------------------------------------
*/
static struct map_desc omap_io_desc[] __initdata = {
{ IO_VIRT, IO_PHYS, IO_SIZE, MT_DEVICE },
};
#ifdef CONFIG_ARCH_OMAP730
static struct map_desc omap730_io_desc[] __initdata = {
{ OMAP730_DSP_BASE, OMAP730_DSP_START, OMAP730_DSP_SIZE, MT_DEVICE },
{ OMAP730_DSPREG_BASE, OMAP730_DSPREG_START, OMAP730_DSPREG_SIZE, MT_DEVICE },
{ OMAP730_SRAM_BASE, OMAP730_SRAM_START, OMAP730_SRAM_SIZE, MT_DEVICE }
};
#endif
#ifdef CONFIG_ARCH_OMAP1510
static struct map_desc omap1510_io_desc[] __initdata = {
{ OMAP1510_DSP_BASE, OMAP1510_DSP_START, OMAP1510_DSP_SIZE, MT_DEVICE },
{ OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_START, OMAP1510_DSPREG_SIZE, MT_DEVICE },
{ OMAP1510_SRAM_BASE, OMAP1510_SRAM_START, OMAP1510_SRAM_SIZE, MT_DEVICE }
};
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
static struct map_desc omap1610_io_desc[] __initdata = {
{ OMAP16XX_DSP_BASE, OMAP16XX_DSP_START, OMAP16XX_DSP_SIZE, MT_DEVICE },
{ OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_START, OMAP16XX_DSPREG_SIZE, MT_DEVICE },
{ OMAP16XX_SRAM_BASE, OMAP16XX_SRAM_START, OMAP1610_SRAM_SIZE, MT_DEVICE }
};
static struct map_desc omap5912_io_desc[] __initdata = {
{ OMAP16XX_DSP_BASE, OMAP16XX_DSP_START, OMAP16XX_DSP_SIZE, MT_DEVICE },
{ OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_START, OMAP16XX_DSPREG_SIZE, MT_DEVICE },
/*
* The OMAP5912 has 250kByte internal SRAM. Because the mapping is baseed on page
* size (4kByte), it seems that the last 2kByte (=0x800) of the 250kByte are not mapped.
* Add additional 2kByte (0x800) so that the last page is mapped and the last 2kByte
* can be used.
*/
{ OMAP16XX_SRAM_BASE, OMAP16XX_SRAM_START, OMAP5912_SRAM_SIZE + 0x800, MT_DEVICE }
};
#endif
static int initialized = 0;
static void __init _omap_map_io(void)
{
initialized = 1;
/* We have to initialize the IO space mapping before we can run
* cpu_is_omapxxx() macros. */
iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
omap_check_revision();
#ifdef CONFIG_ARCH_OMAP730
if (cpu_is_omap730()) {
iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
}
#endif
#ifdef CONFIG_ARCH_OMAP1510
if (cpu_is_omap1510()) {
iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
}
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
if (cpu_is_omap1610() || cpu_is_omap1710()) {
iotable_init(omap1610_io_desc, ARRAY_SIZE(omap1610_io_desc));
}
if (cpu_is_omap5912()) {
iotable_init(omap5912_io_desc, ARRAY_SIZE(omap5912_io_desc));
}
#endif
/* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
* on a Posted Write in the TIPB Bridge".
*/
omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
/* Must init clocks early to assure that timer interrupt works
*/
clk_init();
}
/*
* This should only get called from board specific init
*/
void omap_map_io(void)
{
if (!initialized)
_omap_map_io();
}
static inline unsigned int omap_serial_in(struct plat_serial8250_port *up,
int offset)
{
offset <<= up->regshift;
return (unsigned int)__raw_readb(up->membase + offset);
}
static inline void omap_serial_outp(struct plat_serial8250_port *p, int offset,
int value)
{
offset <<= p->regshift;
__raw_writeb(value, p->membase + offset);
}
/*
* Internal UARTs need to be initialized for the 8250 autoconfig to work
* properly. Note that the TX watermark initialization may not be needed
* once the 8250.c watermark handling code is merged.
*/
static void __init omap_serial_reset(struct plat_serial8250_port *p)
{
omap_serial_outp(p, UART_OMAP_MDR1, 0x07); /* disable UART */
omap_serial_outp(p, UART_OMAP_SCR, 0x08); /* TX watermark */
omap_serial_outp(p, UART_OMAP_MDR1, 0x00); /* enable UART */
if (!cpu_is_omap1510()) {
omap_serial_outp(p, UART_OMAP_SYSC, 0x01);
while (!(omap_serial_in(p, UART_OMAP_SYSC) & 0x01));
}
}
static struct plat_serial8250_port serial_platform_data[] = {
{
.membase = (char*)IO_ADDRESS(OMAP_UART1_BASE),
.mapbase = (unsigned long)OMAP_UART1_BASE,
.irq = INT_UART1,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = OMAP16XX_BASE_BAUD * 16,
},
{
.membase = (char*)IO_ADDRESS(OMAP_UART2_BASE),
.mapbase = (unsigned long)OMAP_UART2_BASE,
.irq = INT_UART2,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = OMAP16XX_BASE_BAUD * 16,
},
{
.membase = (char*)IO_ADDRESS(OMAP_UART3_BASE),
.mapbase = (unsigned long)OMAP_UART3_BASE,
.irq = INT_UART3,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 2,
.uartclk = OMAP16XX_BASE_BAUD * 16,
},
{ },
};
static struct platform_device serial_device = {
.name = "serial8250",
.id = 0,
.dev = {
.platform_data = serial_platform_data,
},
};
/*
* Note that on Innovator-1510 UART2 pins conflict with USB2.
* By default UART2 does not work on Innovator-1510 if you have
* USB OHCI enabled. To use UART2, you must disable USB2 first.
*/
void __init omap_serial_init(int ports[OMAP_MAX_NR_PORTS])
{
int i;
if (cpu_is_omap730()) {
serial_platform_data[0].regshift = 0;
serial_platform_data[1].regshift = 0;
serial_platform_data[0].irq = INT_730_UART_MODEM_1;
serial_platform_data[1].irq = INT_730_UART_MODEM_IRDA_2;
}
if (cpu_is_omap1510()) {
serial_platform_data[0].uartclk = OMAP1510_BASE_BAUD * 16;
serial_platform_data[1].uartclk = OMAP1510_BASE_BAUD * 16;
serial_platform_data[2].uartclk = OMAP1510_BASE_BAUD * 16;
}
for (i = 0; i < OMAP_MAX_NR_PORTS; i++) {
unsigned char reg;
if (ports[i] == 0) {
serial_platform_data[i].membase = 0;
serial_platform_data[i].mapbase = 0;
continue;
}
switch (i) {
case 0:
if (cpu_is_omap1510()) {
omap_cfg_reg(UART1_TX);
omap_cfg_reg(UART1_RTS);
if (machine_is_omap_innovator()) {
reg = fpga_read(OMAP1510_FPGA_POWER);
reg |= OMAP1510_FPGA_PCR_COM1_EN;
fpga_write(reg, OMAP1510_FPGA_POWER);
udelay(10);
}
}
break;
case 1:
if (cpu_is_omap1510()) {
omap_cfg_reg(UART2_TX);
omap_cfg_reg(UART2_RTS);
if (machine_is_omap_innovator()) {
reg = fpga_read(OMAP1510_FPGA_POWER);
reg |= OMAP1510_FPGA_PCR_COM2_EN;
fpga_write(reg, OMAP1510_FPGA_POWER);
udelay(10);
}
}
break;
case 2:
if (cpu_is_omap1510()) {
omap_cfg_reg(UART3_TX);
omap_cfg_reg(UART3_RX);
}
if (cpu_is_omap1710()) {
clk_enable(clk_get(0, "uart3_ck"));
}
break;
}
omap_serial_reset(&serial_platform_data[i]);
}
}
static int __init omap_init(void)
{
return platform_device_register(&serial_device);
}
arch_initcall(omap_init);
#define NO_LENGTH_CHECK 0xffffffff
extern int omap_bootloader_tag_len;
extern u8 omap_bootloader_tag[];
struct omap_board_config_kernel *omap_board_config;
int omap_board_config_size = 0;
static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
{
struct omap_board_config_kernel *kinfo = NULL;
int i;
#ifdef CONFIG_OMAP_BOOT_TAG
struct omap_board_config_entry *info = NULL;
if (omap_bootloader_tag_len > 4)
info = (struct omap_board_config_entry *) omap_bootloader_tag;
while (info != NULL) {
u8 *next;
if (info->tag == tag) {
if (skip == 0)
break;
skip--;
}
if ((info->len & 0x03) != 0) {
/* We bail out to avoid an alignment fault */
printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
info->len, info->tag);
return NULL;
}
next = (u8 *) info + sizeof(*info) + info->len;
if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
info = NULL;
else
info = (struct omap_board_config_entry *) next;
}
if (info != NULL) {
/* Check the length as a lame attempt to check for
* binary inconsistancy. */
if (len != NO_LENGTH_CHECK) {
/* Word-align len */
if (len & 0x03)
len = (len + 3) & ~0x03;
if (info->len != len) {
printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
tag, len, info->len);
return NULL;
}
}
if (len_out != NULL)
*len_out = info->len;
return info->data;
}
#endif
/* Try to find the config from the board-specific structures
* in the kernel. */
for (i = 0; i < omap_board_config_size; i++) {
if (omap_board_config[i].tag == tag) {
kinfo = &omap_board_config[i];
break;
}
}
if (kinfo == NULL)
return NULL;
return kinfo->data;
}
const void *__omap_get_config(u16 tag, size_t len, int nr)
{
return get_config(tag, len, nr, NULL);
}
EXPORT_SYMBOL(__omap_get_config);
const void *omap_get_var_config(u16 tag, size_t *len)
{
return get_config(tag, NO_LENGTH_CHECK, 0, len);
}
EXPORT_SYMBOL(omap_get_var_config);
static int __init omap_add_serial_console(void)
{
const struct omap_uart_config *info;
info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
if (info != NULL && info->console_uart) {
static char speed[11], *opt = NULL;
if (info->console_speed) {
snprintf(speed, sizeof(speed), "%u", info->console_speed);
opt = speed;
}
return add_preferred_console("ttyS", info->console_uart - 1, opt);
}
return 0;
}
console_initcall(omap_add_serial_console);
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