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sm501.c
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sm501.c
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/* linux/drivers/mfd/sm501.c
*
* Copyright (C) 2006 Simtec Electronics
* Ben Dooks <[email protected]>
* Vincent Sanders <[email protected]>
*
* 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.
*
* SM501 MFD driver
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/i2c-gpio.h>
#include <linux/sm501.h>
#include <linux/sm501-regs.h>
#include <linux/serial_8250.h>
#include <asm/io.h>
struct sm501_device {
struct list_head list;
struct platform_device pdev;
};
struct sm501_gpio;
#ifdef CONFIG_MFD_SM501_GPIO
#include <linux/gpio.h>
struct sm501_gpio_chip {
struct gpio_chip gpio;
struct sm501_gpio *ourgpio; /* to get back to parent. */
void __iomem *regbase;
};
struct sm501_gpio {
struct sm501_gpio_chip low;
struct sm501_gpio_chip high;
spinlock_t lock;
unsigned int registered : 1;
void __iomem *regs;
struct resource *regs_res;
};
#else
struct sm501_gpio {
/* no gpio support, empty definition for sm501_devdata. */
};
#endif
struct sm501_devdata {
spinlock_t reg_lock;
struct mutex clock_lock;
struct list_head devices;
struct sm501_gpio gpio;
struct device *dev;
struct resource *io_res;
struct resource *mem_res;
struct resource *regs_claim;
struct sm501_platdata *platdata;
unsigned int in_suspend;
unsigned long pm_misc;
int unit_power[20];
unsigned int pdev_id;
unsigned int irq;
void __iomem *regs;
unsigned int rev;
};
#define MHZ (1000 * 1000)
#ifdef DEBUG
static const unsigned int div_tab[] = {
[0] = 1,
[1] = 2,
[2] = 4,
[3] = 8,
[4] = 16,
[5] = 32,
[6] = 64,
[7] = 128,
[8] = 3,
[9] = 6,
[10] = 12,
[11] = 24,
[12] = 48,
[13] = 96,
[14] = 192,
[15] = 384,
[16] = 5,
[17] = 10,
[18] = 20,
[19] = 40,
[20] = 80,
[21] = 160,
[22] = 320,
[23] = 604,
};
static unsigned long decode_div(unsigned long pll2, unsigned long val,
unsigned int lshft, unsigned int selbit,
unsigned long mask)
{
if (val & selbit)
pll2 = 288 * MHZ;
return pll2 / div_tab[(val >> lshft) & mask];
}
#define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x)
/* sm501_dump_clk
*
* Print out the current clock configuration for the device
*/
static void sm501_dump_clk(struct sm501_devdata *sm)
{
unsigned long misct = readl(sm->regs + SM501_MISC_TIMING);
unsigned long pm0 = readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
unsigned long pm1 = readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
unsigned long pmc = readl(sm->regs + SM501_POWER_MODE_CONTROL);
unsigned long sdclk0, sdclk1;
unsigned long pll2 = 0;
switch (misct & 0x30) {
case 0x00:
pll2 = 336 * MHZ;
break;
case 0x10:
pll2 = 288 * MHZ;
break;
case 0x20:
pll2 = 240 * MHZ;
break;
case 0x30:
pll2 = 192 * MHZ;
break;
}
sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ;
sdclk0 /= div_tab[((misct >> 8) & 0xf)];
sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ;
sdclk1 /= div_tab[((misct >> 16) & 0xf)];
dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n",
misct, pm0, pm1);
dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n",
fmt_freq(pll2), sdclk0, sdclk1);
dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1);
dev_dbg(sm->dev, "PM0[%c]: "
"P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
"M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
(pmc & 3 ) == 0 ? '*' : '-',
fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)),
fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)),
fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)),
fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15)));
dev_dbg(sm->dev, "PM1[%c]: "
"P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), "
"M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n",
(pmc & 3 ) == 1 ? '*' : '-',
fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)),
fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)),
fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)),
fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15)));
}
static void sm501_dump_regs(struct sm501_devdata *sm)
{
void __iomem *regs = sm->regs;
dev_info(sm->dev, "System Control %08x\n",
readl(regs + SM501_SYSTEM_CONTROL));
dev_info(sm->dev, "Misc Control %08x\n",
readl(regs + SM501_MISC_CONTROL));
dev_info(sm->dev, "GPIO Control Low %08x\n",
readl(regs + SM501_GPIO31_0_CONTROL));
dev_info(sm->dev, "GPIO Control Hi %08x\n",
readl(regs + SM501_GPIO63_32_CONTROL));
dev_info(sm->dev, "DRAM Control %08x\n",
readl(regs + SM501_DRAM_CONTROL));
dev_info(sm->dev, "Arbitration Ctrl %08x\n",
readl(regs + SM501_ARBTRTN_CONTROL));
dev_info(sm->dev, "Misc Timing %08x\n",
readl(regs + SM501_MISC_TIMING));
}
static void sm501_dump_gate(struct sm501_devdata *sm)
{
dev_info(sm->dev, "CurrentGate %08x\n",
readl(sm->regs + SM501_CURRENT_GATE));
dev_info(sm->dev, "CurrentClock %08x\n",
readl(sm->regs + SM501_CURRENT_CLOCK));
dev_info(sm->dev, "PowerModeControl %08x\n",
readl(sm->regs + SM501_POWER_MODE_CONTROL));
}
#else
static inline void sm501_dump_gate(struct sm501_devdata *sm) { }
static inline void sm501_dump_regs(struct sm501_devdata *sm) { }
static inline void sm501_dump_clk(struct sm501_devdata *sm) { }
#endif
/* sm501_sync_regs
*
* ensure the
*/
static void sm501_sync_regs(struct sm501_devdata *sm)
{
readl(sm->regs);
}
static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay)
{
/* during suspend/resume, we are currently not allowed to sleep,
* so change to using mdelay() instead of msleep() if we
* are in one of these paths */
if (sm->in_suspend)
mdelay(delay);
else
msleep(delay);
}
/* sm501_misc_control
*
* alters the miscellaneous control parameters
*/
int sm501_misc_control(struct device *dev,
unsigned long set, unsigned long clear)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long misc;
unsigned long save;
unsigned long to;
spin_lock_irqsave(&sm->reg_lock, save);
misc = readl(sm->regs + SM501_MISC_CONTROL);
to = (misc & ~clear) | set;
if (to != misc) {
writel(to, sm->regs + SM501_MISC_CONTROL);
sm501_sync_regs(sm);
dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc);
}
spin_unlock_irqrestore(&sm->reg_lock, save);
return to;
}
EXPORT_SYMBOL_GPL(sm501_misc_control);
/* sm501_modify_reg
*
* Modify a register in the SM501 which may be shared with other
* drivers.
*/
unsigned long sm501_modify_reg(struct device *dev,
unsigned long reg,
unsigned long set,
unsigned long clear)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long data;
unsigned long save;
spin_lock_irqsave(&sm->reg_lock, save);
data = readl(sm->regs + reg);
data |= set;
data &= ~clear;
writel(data, sm->regs + reg);
sm501_sync_regs(sm);
spin_unlock_irqrestore(&sm->reg_lock, save);
return data;
}
EXPORT_SYMBOL_GPL(sm501_modify_reg);
/* sm501_unit_power
*
* alters the power active gate to set specific units on or off
*/
int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long mode;
unsigned long gate;
unsigned long clock;
mutex_lock(&sm->clock_lock);
mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
gate = readl(sm->regs + SM501_CURRENT_GATE);
clock = readl(sm->regs + SM501_CURRENT_CLOCK);
mode &= 3; /* get current power mode */
if (unit >= ARRAY_SIZE(sm->unit_power)) {
dev_err(dev, "%s: bad unit %d\n", __func__, unit);
goto already;
}
dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit,
sm->unit_power[unit], to);
if (to == 0 && sm->unit_power[unit] == 0) {
dev_err(sm->dev, "unit %d is already shutdown\n", unit);
goto already;
}
sm->unit_power[unit] += to ? 1 : -1;
to = sm->unit_power[unit] ? 1 : 0;
if (to) {
if (gate & (1 << unit))
goto already;
gate |= (1 << unit);
} else {
if (!(gate & (1 << unit)))
goto already;
gate &= ~(1 << unit);
}
switch (mode) {
case 1:
writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
mode = 0;
break;
case 2:
case 0:
writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
mode = 1;
break;
default:
return -1;
}
writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
sm501_sync_regs(sm);
dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
gate, clock, mode);
sm501_mdelay(sm, 16);
already:
mutex_unlock(&sm->clock_lock);
return gate;
}
EXPORT_SYMBOL_GPL(sm501_unit_power);
/* Perform a rounded division. */
static long sm501fb_round_div(long num, long denom)
{
/* n / d + 1 / 2 = (2n + d) / 2d */
return (2 * num + denom) / (2 * denom);
}
/* clock value structure. */
struct sm501_clock {
unsigned long mclk;
int divider;
int shift;
unsigned int m, n, k;
};
/* sm501_calc_clock
*
* Calculates the nearest discrete clock frequency that
* can be achieved with the specified input clock.
* the maximum divisor is 3 or 5
*/
static int sm501_calc_clock(unsigned long freq,
struct sm501_clock *clock,
int max_div,
unsigned long mclk,
long *best_diff)
{
int ret = 0;
int divider;
int shift;
long diff;
/* try dividers 1 and 3 for CRT and for panel,
try divider 5 for panel only.*/
for (divider = 1; divider <= max_div; divider += 2) {
/* try all 8 shift values.*/
for (shift = 0; shift < 8; shift++) {
/* Calculate difference to requested clock */
diff = sm501fb_round_div(mclk, divider << shift) - freq;
if (diff < 0)
diff = -diff;
/* If it is less than the current, use it */
if (diff < *best_diff) {
*best_diff = diff;
clock->mclk = mclk;
clock->divider = divider;
clock->shift = shift;
ret = 1;
}
}
}
return ret;
}
/* sm501_calc_pll
*
* Calculates the nearest discrete clock frequency that can be
* achieved using the programmable PLL.
* the maximum divisor is 3 or 5
*/
static unsigned long sm501_calc_pll(unsigned long freq,
struct sm501_clock *clock,
int max_div)
{
unsigned long mclk;
unsigned int m, n, k;
long best_diff = 999999999;
/*
* The SM502 datasheet doesn't specify the min/max values for M and N.
* N = 1 at least doesn't work in practice.
*/
for (m = 2; m <= 255; m++) {
for (n = 2; n <= 127; n++) {
for (k = 0; k <= 1; k++) {
mclk = (24000000UL * m / n) >> k;
if (sm501_calc_clock(freq, clock, max_div,
mclk, &best_diff)) {
clock->m = m;
clock->n = n;
clock->k = k;
}
}
}
}
/* Return best clock. */
return clock->mclk / (clock->divider << clock->shift);
}
/* sm501_select_clock
*
* Calculates the nearest discrete clock frequency that can be
* achieved using the 288MHz and 336MHz PLLs.
* the maximum divisor is 3 or 5
*/
static unsigned long sm501_select_clock(unsigned long freq,
struct sm501_clock *clock,
int max_div)
{
unsigned long mclk;
long best_diff = 999999999;
/* Try 288MHz and 336MHz clocks. */
for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) {
sm501_calc_clock(freq, clock, max_div, mclk, &best_diff);
}
/* Return best clock. */
return clock->mclk / (clock->divider << clock->shift);
}
/* sm501_set_clock
*
* set one of the four clock sources to the closest available frequency to
* the one specified
*/
unsigned long sm501_set_clock(struct device *dev,
int clksrc,
unsigned long req_freq)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
unsigned long gate = readl(sm->regs + SM501_CURRENT_GATE);
unsigned long clock = readl(sm->regs + SM501_CURRENT_CLOCK);
unsigned char reg;
unsigned int pll_reg = 0;
unsigned long sm501_freq; /* the actual frequency acheived */
struct sm501_clock to;
/* find achivable discrete frequency and setup register value
* accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK
* has an extra bit for the divider */
switch (clksrc) {
case SM501_CLOCK_P2XCLK:
/* This clock is divided in half so to achive the
* requested frequency the value must be multiplied by
* 2. This clock also has an additional pre divisor */
if (sm->rev >= 0xC0) {
/* SM502 -> use the programmable PLL */
sm501_freq = (sm501_calc_pll(2 * req_freq,
&to, 5) / 2);
reg = to.shift & 0x07;/* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
else if (to.divider == 5)
reg |= 0x10; /* /5 divider required */
reg |= 0x40; /* select the programmable PLL */
pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m;
} else {
sm501_freq = (sm501_select_clock(2 * req_freq,
&to, 5) / 2);
reg = to.shift & 0x07;/* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
else if (to.divider == 5)
reg |= 0x10; /* /5 divider required */
if (to.mclk != 288000000)
reg |= 0x20; /* which mclk pll is source */
}
break;
case SM501_CLOCK_V2XCLK:
/* This clock is divided in half so to achive the
* requested frequency the value must be multiplied by 2. */
sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
reg=to.shift & 0x07; /* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
if (to.mclk != 288000000)
reg |= 0x10; /* which mclk pll is source */
break;
case SM501_CLOCK_MCLK:
case SM501_CLOCK_M1XCLK:
/* These clocks are the same and not further divided */
sm501_freq = sm501_select_clock( req_freq, &to, 3);
reg=to.shift & 0x07; /* bottom 3 bits are shift */
if (to.divider == 3)
reg |= 0x08; /* /3 divider required */
if (to.mclk != 288000000)
reg |= 0x10; /* which mclk pll is source */
break;
default:
return 0; /* this is bad */
}
mutex_lock(&sm->clock_lock);
mode = readl(sm->regs + SM501_POWER_MODE_CONTROL);
gate = readl(sm->regs + SM501_CURRENT_GATE);
clock = readl(sm->regs + SM501_CURRENT_CLOCK);
clock = clock & ~(0xFF << clksrc);
clock |= reg<<clksrc;
mode &= 3; /* find current mode */
switch (mode) {
case 1:
writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
mode = 0;
break;
case 2:
case 0:
writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
mode = 1;
break;
default:
mutex_unlock(&sm->clock_lock);
return -1;
}
writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
if (pll_reg)
writel(pll_reg, sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
sm501_sync_regs(sm);
dev_info(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n",
gate, clock, mode);
sm501_mdelay(sm, 16);
mutex_unlock(&sm->clock_lock);
sm501_dump_clk(sm);
return sm501_freq;
}
EXPORT_SYMBOL_GPL(sm501_set_clock);
/* sm501_find_clock
*
* finds the closest available frequency for a given clock
*/
unsigned long sm501_find_clock(struct device *dev,
int clksrc,
unsigned long req_freq)
{
struct sm501_devdata *sm = dev_get_drvdata(dev);
unsigned long sm501_freq; /* the frequency achiveable by the 501 */
struct sm501_clock to;
switch (clksrc) {
case SM501_CLOCK_P2XCLK:
if (sm->rev >= 0xC0) {
/* SM502 -> use the programmable PLL */
sm501_freq = (sm501_calc_pll(2 * req_freq,
&to, 5) / 2);
} else {
sm501_freq = (sm501_select_clock(2 * req_freq,
&to, 5) / 2);
}
break;
case SM501_CLOCK_V2XCLK:
sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2);
break;
case SM501_CLOCK_MCLK:
case SM501_CLOCK_M1XCLK:
sm501_freq = sm501_select_clock(req_freq, &to, 3);
break;
default:
sm501_freq = 0; /* error */
}
return sm501_freq;
}
EXPORT_SYMBOL_GPL(sm501_find_clock);
static struct sm501_device *to_sm_device(struct platform_device *pdev)
{
return container_of(pdev, struct sm501_device, pdev);
}
/* sm501_device_release
*
* A release function for the platform devices we create to allow us to
* free any items we allocated
*/
static void sm501_device_release(struct device *dev)
{
kfree(to_sm_device(to_platform_device(dev)));
}
/* sm501_create_subdev
*
* Create a skeleton platform device with resources for passing to a
* sub-driver
*/
static struct platform_device *
sm501_create_subdev(struct sm501_devdata *sm, char *name,
unsigned int res_count, unsigned int platform_data_size)
{
struct sm501_device *smdev;
smdev = kzalloc(sizeof(struct sm501_device) +
(sizeof(struct resource) * res_count) +
platform_data_size, GFP_KERNEL);
if (!smdev)
return NULL;
smdev->pdev.dev.release = sm501_device_release;
smdev->pdev.name = name;
smdev->pdev.id = sm->pdev_id;
smdev->pdev.dev.parent = sm->dev;
if (res_count) {
smdev->pdev.resource = (struct resource *)(smdev+1);
smdev->pdev.num_resources = res_count;
}
if (platform_data_size)
smdev->pdev.dev.platform_data = (void *)(smdev+1);
return &smdev->pdev;
}
/* sm501_register_device
*
* Register a platform device created with sm501_create_subdev()
*/
static int sm501_register_device(struct sm501_devdata *sm,
struct platform_device *pdev)
{
struct sm501_device *smdev = to_sm_device(pdev);
int ptr;
int ret;
for (ptr = 0; ptr < pdev->num_resources; ptr++) {
printk("%s[%d] flags %08lx: %08llx..%08llx\n",
pdev->name, ptr,
pdev->resource[ptr].flags,
(unsigned long long)pdev->resource[ptr].start,
(unsigned long long)pdev->resource[ptr].end);
}
ret = platform_device_register(pdev);
if (ret >= 0) {
dev_dbg(sm->dev, "registered %s\n", pdev->name);
list_add_tail(&smdev->list, &sm->devices);
} else
dev_err(sm->dev, "error registering %s (%d)\n",
pdev->name, ret);
return ret;
}
/* sm501_create_subio
*
* Fill in an IO resource for a sub device
*/
static void sm501_create_subio(struct sm501_devdata *sm,
struct resource *res,
resource_size_t offs,
resource_size_t size)
{
res->flags = IORESOURCE_MEM;
res->parent = sm->io_res;
res->start = sm->io_res->start + offs;
res->end = res->start + size - 1;
}
/* sm501_create_mem
*
* Fill in an MEM resource for a sub device
*/
static void sm501_create_mem(struct sm501_devdata *sm,
struct resource *res,
resource_size_t *offs,
resource_size_t size)
{
*offs -= size; /* adjust memory size */
res->flags = IORESOURCE_MEM;
res->parent = sm->mem_res;
res->start = sm->mem_res->start + *offs;
res->end = res->start + size - 1;
}
/* sm501_create_irq
*
* Fill in an IRQ resource for a sub device
*/
static void sm501_create_irq(struct sm501_devdata *sm,
struct resource *res)
{
res->flags = IORESOURCE_IRQ;
res->parent = NULL;
res->start = res->end = sm->irq;
}
static int sm501_register_usbhost(struct sm501_devdata *sm,
resource_size_t *mem_avail)
{
struct platform_device *pdev;
pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0);
if (!pdev)
return -ENOMEM;
sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000);
sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024);
sm501_create_irq(sm, &pdev->resource[2]);
return sm501_register_device(sm, pdev);
}
static void sm501_setup_uart_data(struct sm501_devdata *sm,
struct plat_serial8250_port *uart_data,
unsigned int offset)
{
uart_data->membase = sm->regs + offset;
uart_data->mapbase = sm->io_res->start + offset;
uart_data->iotype = UPIO_MEM;
uart_data->irq = sm->irq;
uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ;
uart_data->regshift = 2;
uart_data->uartclk = (9600 * 16);
}
static int sm501_register_uart(struct sm501_devdata *sm, int devices)
{
struct platform_device *pdev;
struct plat_serial8250_port *uart_data;
pdev = sm501_create_subdev(sm, "serial8250", 0,
sizeof(struct plat_serial8250_port) * 3);
if (!pdev)
return -ENOMEM;
uart_data = pdev->dev.platform_data;
if (devices & SM501_USE_UART0) {
sm501_setup_uart_data(sm, uart_data++, 0x30000);
sm501_unit_power(sm->dev, SM501_GATE_UART0, 1);
sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0);
sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0);
}
if (devices & SM501_USE_UART1) {
sm501_setup_uart_data(sm, uart_data++, 0x30020);
sm501_unit_power(sm->dev, SM501_GATE_UART1, 1);
sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0);
sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0);
}
pdev->id = PLAT8250_DEV_SM501;
return sm501_register_device(sm, pdev);
}
static int sm501_register_display(struct sm501_devdata *sm,
resource_size_t *mem_avail)
{
struct platform_device *pdev;
pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0);
if (!pdev)
return -ENOMEM;
sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000);
sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000);
sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail);
sm501_create_irq(sm, &pdev->resource[3]);
return sm501_register_device(sm, pdev);
}
#ifdef CONFIG_MFD_SM501_GPIO
static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc)
{
return container_of(gc, struct sm501_gpio_chip, gpio);
}
static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio)
{
return container_of(gpio, struct sm501_devdata, gpio);
}
static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip);
unsigned long result;
result = readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
result >>= offset;
return result & 1UL;
}
static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
unsigned long bit = 1 << offset;
void __iomem *regs = smchip->regbase;
unsigned long save;
unsigned long val;
dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
__func__, chip, offset);
spin_lock_irqsave(&smgpio->lock, save);
val = readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
if (value)
val |= bit;
writel(val, regs);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
spin_unlock_irqrestore(&smgpio->lock, save);
}
static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
{
struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
void __iomem *regs = smchip->regbase;
unsigned long bit = 1 << offset;
unsigned long save;
unsigned long ddr;
dev_info(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
__func__, chip, offset);
spin_lock_irqsave(&smgpio->lock, save);
ddr = readl(regs + SM501_GPIO_DDR_LOW);
writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
spin_unlock_irqrestore(&smgpio->lock, save);
return 0;
}
static int sm501_gpio_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct sm501_gpio_chip *smchip = to_sm501_gpio(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
unsigned long bit = 1 << offset;
void __iomem *regs = smchip->regbase;
unsigned long save;
unsigned long val;
unsigned long ddr;
dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n",
__func__, chip, offset, value);
spin_lock_irqsave(&smgpio->lock, save);
val = readl(regs + SM501_GPIO_DATA_LOW);
if (value)
val |= bit;
else
val &= ~bit;
writel(val, regs);
ddr = readl(regs + SM501_GPIO_DDR_LOW);
writel(ddr | bit, regs + SM501_GPIO_DDR_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
writel(val, regs + SM501_GPIO_DATA_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
spin_unlock_irqrestore(&smgpio->lock, save);
return 0;
}
static struct gpio_chip gpio_chip_template = {
.ngpio = 32,
.direction_input = sm501_gpio_input,
.direction_output = sm501_gpio_output,
.set = sm501_gpio_set,
.get = sm501_gpio_get,
};