// SPDX-License-Identifier: GPL-2.0-only
/* linux/drivers/mfd/sm501.c
*
* Copyright (C) 2006 Simtec Electronics
* Ben Dooks <[email protected]>
* Vincent Sanders <[email protected]>
*
* 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/platform_data/i2c-gpio.h>
#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
#include <linux/slab.h>
#include <linux/sm501.h>
#include <linux/sm501-regs.h>
#include <linux/serial_8250.h>
#include <linux/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;
void __iomem *control; /* address of control reg. */
};
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 = smc501_readl(sm->regs + SM501_MISC_TIMING);
unsigned long pm0 = smc501_readl(sm->regs + SM501_POWER_MODE_0_CLOCK);
unsigned long pm1 = smc501_readl(sm->regs + SM501_POWER_MODE_1_CLOCK);
unsigned long pmc = smc501_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",
smc501_readl(regs + SM501_SYSTEM_CONTROL));
dev_info(sm->dev, "Misc Control %08x\n",
smc501_readl(regs + SM501_MISC_CONTROL));
dev_info(sm->dev, "GPIO Control Low %08x\n",
smc501_readl(regs + SM501_GPIO31_0_CONTROL));
dev_info(sm->dev, "GPIO Control Hi %08x\n",
smc501_readl(regs + SM501_GPIO63_32_CONTROL));
dev_info(sm->dev, "DRAM Control %08x\n",
smc501_readl(regs + SM501_DRAM_CONTROL));
dev_info(sm->dev, "Arbitration Ctrl %08x\n",
smc501_readl(regs + SM501_ARBTRTN_CONTROL));
dev_info(sm->dev, "Misc Timing %08x\n",
smc501_readl(regs + SM501_MISC_TIMING));
}
static void sm501_dump_gate(struct sm501_devdata *sm)
{
dev_info(sm->dev, "CurrentGate %08x\n",
smc501_readl(sm->regs + SM501_CURRENT_GATE));
dev_info(sm->dev, "CurrentClock %08x\n",
smc501_readl(sm->regs + SM501_CURRENT_CLOCK));
dev_info(sm->dev, "PowerModeControl %08x\n",
smc501_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)
{
smc501_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 = smc501_readl(sm->regs + SM501_MISC_CONTROL);
to = (misc & ~clear) | set;
if (to != misc) {
smc501_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 = smc501_readl(sm->regs + reg);
data |= set;
data &= ~clear;
smc501_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 = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
clock = smc501_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:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
mode = 0;
break;
case 2:
case 0:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
mode = 1;
break;
default:
gate = -1;
goto already;
}
smc501_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);
/* 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 = DIV_ROUND_CLOSEST(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 = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
unsigned long gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
unsigned long clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
unsigned int pll_reg = 0;
unsigned long sm501_freq; /* the actual frequency achieved */
u64 reg;
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 achieve 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 achieve 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 = smc501_readl(sm->regs + SM501_POWER_MODE_CONTROL);
gate = smc501_readl(sm->regs + SM501_CURRENT_GATE);
clock = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
clock = clock & ~(0xFF << clksrc);
clock |= reg<<clksrc;
mode &= 3; /* find current mode */
switch (mode) {
case 1:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_0_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK);
mode = 0;
break;
case 2:
case 0:
smc501_writel(gate, sm->regs + SM501_POWER_MODE_1_GATE);
smc501_writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK);
mode = 1;
break;
default:
mutex_unlock(&sm->clock_lock);
return -1;
}
smc501_writel(mode, sm->regs + SM501_POWER_MODE_CONTROL);
if (pll_reg)
smc501_writel(pll_reg,
sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL);
sm501_sync_regs(sm);
dev_dbg(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 achieveable 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;
smdev->pdev.dev.coherent_dma_mask = 0xffffffff;
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(KERN_DEBUG "%s[%d] %pR\n",
pdev->name, ptr, &pdev->resource[ptr]);
}
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 = dev_get_platdata(&pdev->dev);
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_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 = gpiochip_get_data(chip);
unsigned long result;
result = smc501_readl(smgpio->regbase + SM501_GPIO_DATA_LOW);
result >>= offset;
return result & 1UL;
}
static void sm501_gpio_ensure_gpio(struct sm501_gpio_chip *smchip,
unsigned long bit)
{
unsigned long ctrl;
/* check and modify if this pin is not set as gpio. */
if (smc501_readl(smchip->control) & bit) {
dev_info(sm501_gpio_to_dev(smchip->ourgpio)->dev,
"changing mode of gpio, bit %08lx\n", bit);
ctrl = smc501_readl(smchip->control);
ctrl &= ~bit;
smc501_writel(ctrl, smchip->control);
sm501_sync_regs(sm501_gpio_to_dev(smchip->ourgpio));
}
}
static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct sm501_gpio_chip *smchip = gpiochip_get_data(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 = smc501_readl(regs + SM501_GPIO_DATA_LOW) & ~bit;
if (value)
val |= bit;
smc501_writel(val, regs);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
sm501_gpio_ensure_gpio(smchip, bit);
spin_unlock_irqrestore(&smgpio->lock, save);
}
static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset)
{
struct sm501_gpio_chip *smchip = gpiochip_get_data(chip);
struct sm501_gpio *smgpio = smchip->ourgpio;
void __iomem *regs = smchip->regbase;
unsigned long bit = 1 << offset;
unsigned long save;
unsigned long ddr;
dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n",
__func__, chip, offset);
spin_lock_irqsave(&smgpio->lock, save);
ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW);
smc501_writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
sm501_gpio_ensure_gpio(smchip, bit);
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 = gpiochip_get_data(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 = smc501_readl(regs + SM501_GPIO_DATA_LOW);
if (value)
val |= bit;
else
val &= ~bit;
smc501_writel(val, regs);
ddr = smc501_readl(regs + SM501_GPIO_DDR_LOW);
smc501_writel(ddr | bit, regs + SM501_GPIO_DDR_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
smc501_writel(val, regs + SM501_GPIO_DATA_LOW);
sm501_sync_regs(sm501_gpio_to_dev(smgpio));
spin_unlock_irqrestore(&smgpio->lock, save);
return 0;
}
static const 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,
};
static int sm501_gpio_register_chip(struct sm501_devdata *sm,
struct sm501_gpio *gpio,
struct sm501_gpio_chip *chip)
{
struct sm501_platdata *pdata = sm->platdata;
struct gpio_chip *gchip = &chip->gpio;
int base = pdata->gpio_base;
chip->gpio = gpio_chip_template;
if (chip == &gpio->high) {
if (base > 0)
base += 32;
chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH;
chip->control = sm->regs + SM501_GPIO63_32_CONTROL;
gchip->label = "SM501-HIGH";
} else {
chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW;
chip->control = sm->regs + SM501_GPIO31_0_CONTROL;
gchip->label = "SM501-LOW";
}
gchip->base = base;
chip->ourgpio = gpio;
return gpiochip_add_data(gchip, chip);
}
static int sm501_register_gpio(struct sm501_devdata *sm)
{
struct sm501_gpio *gpio = &sm->gpio;
resource_size_t iobase = sm->io_res->start + SM501_GPIO;
int ret;
dev_dbg(sm->dev, "registering gpio block %08llx\n",
(unsigned long long)iobase);
spin_lock_init(&gpio->lock);
gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio");
if (!gpio->regs_res) {
dev_err(sm->dev, "gpio: failed to request region\n");
return -ENXIO;
}
gpio->regs = ioremap(iobase, 0x20);
if (!gpio->regs) {
dev_err(sm->dev, "gpio: failed to remap registers\n");
ret = -ENXIO;
goto err_claimed;
}
/* Register both our chips. */
ret = sm501_gpio_register_chip(sm, gpio, &gpio->low);
if (ret) {
dev_err(sm->dev, "failed to add low chip\n");
goto err_mapped;
}
ret = sm501_gpio_register_chip(sm, gpio, &gpio->high);
if (ret) {
dev_err(sm->dev, "failed to add high chip\n");
goto err_low_chip;
}
gpio->registered = 1;
return 0;
err_low_chip:
gpiochip_remove(&gpio->low.gpio);
err_mapped:
iounmap(gpio->regs);
err_claimed:
release_mem_region(iobase, 0x20);
return ret;
}
static void sm501_gpio_remove(struct sm501_devdata *sm)
{
struct sm501_gpio *gpio = &sm->gpio;
resource_size_t iobase = sm->io_res->start + SM501_GPIO;
if (!sm->gpio.registered)
return;
gpiochip_remove(&gpio->low.gpio);
gpiochip_remove(&gpio->high.gpio);
iounmap(gpio->regs);
release_mem_region(iobase, 0x20);
}
static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
{
return sm->gpio.registered;
}
#else
static inline int sm501_register_gpio(struct sm501_devdata *sm)
{
return 0;
}
static inline void sm501_gpio_remove(struct sm501_devdata *sm)
{
}
static inline int sm501_gpio_isregistered(struct sm501_devdata *sm)
{
return 0;
}
#endif
static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
struct sm501_platdata_gpio_i2c *iic)
{
struct i2c_gpio_platform_data *icd;
struct platform_device *pdev;
struct gpiod_lookup_table *lookup;
pdev = sm501_create_subdev(sm, "i2c-gpio", 0,
sizeof(struct i2c_gpio_platform_data));
if (!pdev)
return -ENOMEM;
/* Create a gpiod lookup using gpiochip-local offsets */
lookup = devm_kzalloc(&pdev->dev, struct_size(lookup, table, 3),
GFP_KERNEL);
if (!lookup)
return -ENOMEM;
lookup->dev_id = "i2c-gpio";
lookup->table[0] = (struct gpiod_lookup)
GPIO_LOOKUP_IDX(iic->pin_sda < 32 ? "SM501-LOW" : "SM501-HIGH",
iic->pin_sda % 32, NULL, 0,
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN);
lookup->table[1] = (struct gpiod_lookup)
GPIO_LOOKUP_IDX(iic->pin_scl < 32 ? "SM501-LOW" : "SM501-HIGH",
iic->pin_scl % 32, NULL, 1,
GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN);
gpiod_add_lookup_table(lookup);
icd = dev_get_platdata(&pdev->dev);
icd->timeout = iic->timeout;
icd->udelay = iic->udelay;
/* note, we can't use either of the pin numbers, as the i2c-gpio
* driver uses the platform.id field to generate the bus number
* to register with the i2c core; The i2c core doesn't have enough
* entries to deal with anything we currently use.
*/
pdev->id = iic->bus_num;
dev_info(sm->dev, "registering i2c-%d: sda=%d, scl=%d\n",
iic->bus_num,
iic->pin_sda, iic->pin_scl);
return sm501_register_device(sm, pdev);
}
static int sm501_register_gpio_i2c(struct sm501_devdata *sm,
struct sm501_platdata *pdata)
{
struct sm501_platdata_gpio_i2c *iic = pdata->gpio_i2c;
int index;
int ret;
for (index = 0; index < pdata->gpio_i2c_nr; index++, iic++) {
ret = sm501_register_gpio_i2c_instance(sm, iic);
if (ret < 0)
return ret;
}
return 0;
}
/* dbg_regs_show
*
* Debug attribute to attach to parent device to show core registers
*/
static ssize_t dbg_regs_show(struct device *dev,
struct device_attribute *attr, char *buff)
{
struct sm501_devdata *sm = dev_get_drvdata(dev) ;
unsigned int reg;
char *ptr = buff;
int ret;
for (reg = 0x00; reg < 0x70; reg += 4) {
ret = sprintf(ptr, "%08x = %08x\n",
reg, smc501_readl(sm->regs + reg));
ptr += ret;
}
return ptr - buff;
}
static DEVICE_ATTR_RO(dbg_regs);
/* sm501_init_reg
*
* Helper function for the init code to setup a register
*
* clear the bits which are set in r->mask, and then set
* the bits set in r->set.
*/
static inline void sm501_init_reg(struct sm501_devdata *sm,
unsigned long reg,
struct sm501_reg_init *r)
{
unsigned long tmp;
tmp = smc501_readl(sm->regs + reg);
tmp &= ~r->mask;
tmp |= r->set;
smc501_writel(tmp, sm->regs + reg);
}
/* sm501_init_regs
*
* Setup core register values
*/
static void sm501_init_regs(struct sm501_devdata *sm,
struct sm501_initdata *init)
{
sm501_misc_control(sm->dev,
init->misc_control.set,
init->misc_control.mask);
sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing);
sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low);
sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high);
if (init->m1xclk) {
dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk);
sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk);
}
if (init->mclk) {
dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
}
}
/* Check the PLL sources for the M1CLK and M1XCLK
*
* If the M1CLK and M1XCLKs are not sourced from the same PLL, then
* there is a risk (see errata AB-5) that the SM501 will cease proper
* function. If this happens, then it is likely the SM501 will
* hang the system.
*/
static int sm501_check_clocks(struct sm501_devdata *sm)
{
unsigned long pwrmode = smc501_readl(sm->regs + SM501_CURRENT_CLOCK);
unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC);
unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC);
return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0));
}
static unsigned int sm501_mem_local[] = {
[0] = 4*1024*1024,
[1] = 8*1024*1024,
[2] = 16*1024*1024,
[3] = 32*1024*1024,
[4] = 64*1024*1024,
[5] = 2*1024*1024,
};
/* sm501_init_dev
*
* Common init code for an SM501
*/
static int sm501_init_dev(struct sm501_devdata *sm)
{
struct sm501_initdata *idata;
struct sm501_platdata *pdata;
resource_size_t mem_avail;
unsigned long dramctrl;
unsigned long devid;
int ret;
mutex_init(&sm->clock_lock);
spin_lock_init(&sm->reg_lock);
INIT_LIST_HEAD(&sm->devices);
devid = smc501_readl(sm->regs + SM501_DEVICEID);
if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) {
dev_err(sm->dev, "incorrect device id %08lx\n", devid);
return -EINVAL;
}
/* disable irqs */
smc501_writel(0, sm->regs + SM501_IRQ_MASK);
dramctrl = smc501_readl(sm->regs + SM501_DRAM_CONTROL);
mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7];
dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n",
sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq);
sm->rev = devid & SM501_DEVICEID_REVMASK;
sm501_dump_gate(sm);
ret = device_create_file(sm->dev, &dev_attr_dbg_regs);
if (ret)
dev_err(sm->dev, "failed to create debug regs file\n");
sm501_dump_clk(sm);
/* check to see if we have some device initialisation */
pdata = sm->platdata;
idata = pdata ? pdata->init : NULL;
if (idata) {
sm501_init_regs(sm, idata);
if (idata->devices & SM501_USE_USB_HOST)
sm501_register_usbhost(sm, &mem_avail);
if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1))
sm501_register_uart(sm, idata->devices);
if (idata->devices & SM501_USE_GPIO)
sm501_register_gpio(sm);
}
if (pdata && pdata->gpio_i2c && pdata->gpio_i2c_nr > 0) {
if (!sm501_gpio_isregistered(sm))
dev_err(sm->dev, "no gpio available for i2c gpio.\n");
else
sm501_register_gpio_i2c(sm, pdata);
}
ret = sm501_check_clocks(sm);
if (ret) {
dev_err(sm->dev, "M1X and M clocks sourced from different "
"PLLs\n");
return -EINVAL;
}
/* always create a framebuffer */
sm501_register_display(sm, &mem_avail);
return 0;
}
static int sm501_plat_probe(struct platform_device *dev)
{
struct sm501_devdata *sm;
int ret;
sm = kzalloc(sizeof(*sm), GFP_KERNEL);
if (!sm) {
ret = -ENOMEM;
goto err1;
}
sm->dev = &dev->dev;
sm->pdev_id = dev->id;
sm->platdata = dev_get_platdata(&dev->dev);
ret = platform_get_irq(dev, 0);
if (ret < 0)
goto err_res;
sm->irq = ret;
sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!sm->io_res || !sm->mem_res) {
dev_err(&dev->dev, "failed to get IO resource\n");
ret = -ENOENT;
goto err_res;
}
sm->regs_claim = request_mem_region(sm->io_res->start,
0x100, "sm501");
if (!sm->regs_claim) {
dev_err(&dev->dev, "cannot claim registers\n");
ret = -EBUSY;
goto err_res;
}
platform_set_drvdata(dev, sm);
sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
if (!sm->regs) {
dev_err(&dev->dev, "cannot remap registers\n");
ret = -EIO;
goto err_claim;
}
ret = sm501_init_dev(sm);
if (ret)
goto err_unmap;
return 0;
err_unmap:
iounmap(sm->regs);
err_claim:
release_mem_region(sm->io_res->start, 0x100);
err_res:
kfree(sm);
err1:
return ret;
}
/* power management support */
static void sm501_set_power(struct sm501_devdata *sm, int on)
{
struct sm501_platdata *pd = sm->platdata;
if (!pd)
return;
if (pd->get_power) {
if (pd->get_power(sm->dev) == on) {
dev_dbg(sm->dev, "is already %d\n", on);
return;
}
}
if (pd->set_power) {
dev_dbg(sm->dev, "setting power to %d\n", on);
pd->set_power(sm->dev, on);
sm501_mdelay(sm, 10);
}
}
static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state)
{
struct sm501_devdata *sm = platform_get_drvdata(pdev);
sm->in_suspend = 1;
sm->pm_misc = smc501_readl(sm->regs + SM501_MISC_CONTROL);
sm501_dump_regs(sm);
if (sm->platdata) {
if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF)
sm501_set_power(sm, 0);
}
return 0;
}
static int sm501_plat_resume(struct platform_device *pdev)
{
struct sm501_devdata *sm = platform_get_drvdata(pdev);
sm501_set_power(sm, 1);
sm501_dump_regs(sm);
sm501_dump_gate(sm);
sm501_dump_clk(sm);
/* check to see if we are in the same state as when suspended */
if (smc501_readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) {
dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n");
smc501_writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL);
/* our suspend causes the controller state to change,
* either by something attempting setup, power loss,
* or an external reset event on power change */
if (sm->platdata && sm->platdata->init) {
sm501_init_regs(sm, sm->platdata->init);
}
}
/* dump our state from resume */
sm501_dump_regs(sm);
sm501_dump_clk(sm);
sm->in_suspend = 0;
return 0;
}
/* Initialisation data for PCI devices */
static struct sm501_initdata sm501_pci_initdata = {
.gpio_high = {
.set = 0x3F000000, /* 24bit panel */
.mask = 0x0,
},
.misc_timing = {
.set = 0x010100, /* SDRAM timing */
.mask = 0x1F1F00,
},
.misc_control = {
.set = SM501_MISC_PNL_24BIT,
.mask = 0,
},
.devices = SM501_USE_ALL,
/* Errata AB-3 says that 72MHz is the fastest available
* for 33MHZ PCI with proper bus-mastering operation */
.mclk = 72 * MHZ,
.m1xclk = 144 * MHZ,
};
static struct sm501_platdata_fbsub sm501_pdata_fbsub = {
.flags = (SM501FB_FLAG_USE_INIT_MODE |
SM501FB_FLAG_USE_HWCURSOR |
SM501FB_FLAG_USE_HWACCEL |
SM501FB_FLAG_DISABLE_AT_EXIT),
};
static struct sm501_platdata_fb sm501_fb_pdata = {
.fb_route = SM501_FB_OWN,
.fb_crt = &sm501_pdata_fbsub,
.fb_pnl = &sm501_pdata_fbsub,
};
static struct sm501_platdata sm501_pci_platdata = {
.init = &sm501_pci_initdata,
.fb = &sm501_fb_pdata,
.gpio_base = -1,
};
static int sm501_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct sm501_devdata *sm;
int err;
sm = kzalloc(sizeof(*sm), GFP_KERNEL);
if (!sm) {
err = -ENOMEM;
goto err1;
}
/* set a default set of platform data */
dev->dev.platform_data = sm->platdata = &sm501_pci_platdata;
/* set a hopefully unique id for our child platform devices */
sm->pdev_id = 32 + dev->devfn;
pci_set_drvdata(dev, sm);
err = pci_enable_device(dev);
if (err) {
dev_err(&dev->dev, "cannot enable device\n");
goto err2;
}
sm->dev = &dev->dev;
sm->irq = dev->irq;
#ifdef __BIG_ENDIAN
/* if the system is big-endian, we most probably have a
* translation in the IO layer making the PCI bus little endian
* so make the framebuffer swapped pixels */
sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN;
#endif
/* check our resources */
if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) {
dev_err(&dev->dev, "region #0 is not memory?\n");
err = -EINVAL;
goto err3;
}
if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) {
dev_err(&dev->dev, "region #1 is not memory?\n");
err = -EINVAL;
goto err3;
}
/* make our resources ready for sharing */
sm->io_res = &dev->resource[1];
sm->mem_res = &dev->resource[0];
sm->regs_claim = request_mem_region(sm->io_res->start,
0x100, "sm501");
if (!sm->regs_claim) {
dev_err(&dev->dev, "cannot claim registers\n");
err= -EBUSY;
goto err3;
}
sm->regs = pci_ioremap_bar(dev, 1);
if (!sm->regs) {
dev_err(&dev->dev, "cannot remap registers\n");
err = -EIO;
goto err4;
}
sm501_init_dev(sm);
return 0;
err4:
release_mem_region(sm->io_res->start, 0x100);
err3:
pci_disable_device(dev);
err2:
kfree(sm);
err1:
return err;
}
static void sm501_remove_sub(struct sm501_devdata *sm,
struct sm501_device *smdev)
{
list_del(&smdev->list);
platform_device_unregister(&smdev->pdev);
}
static void sm501_dev_remove(struct sm501_devdata *sm)
{
struct sm501_device *smdev, *tmp;
list_for_each_entry_safe(smdev, tmp, &sm->devices, list)
sm501_remove_sub(sm, smdev);
device_remove_file(sm->dev, &dev_attr_dbg_regs);
sm501_gpio_remove(sm);
}
static void sm501_pci_remove(struct pci_dev *dev)
{
struct sm501_devdata *sm = pci_get_drvdata(dev);
sm501_dev_remove(sm);
iounmap(sm->regs);
release_mem_region(sm->io_res->start, 0x100);
pci_disable_device(dev);
}
static void sm501_plat_remove(struct platform_device *dev)
{
struct sm501_devdata *sm = platform_get_drvdata(dev);
sm501_dev_remove(sm);
iounmap(sm->regs);
release_mem_region(sm->io_res->start, 0x100);
}
static const struct pci_device_id sm501_pci_tbl[] = {
{ 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, sm501_pci_tbl);
static struct pci_driver sm501_pci_driver = {
.name = "sm501",
.id_table = sm501_pci_tbl,
.probe = sm501_pci_probe,
.remove = sm501_pci_remove,
};
MODULE_ALIAS("platform:sm501");
static const struct of_device_id of_sm501_match_tbl[] = {
{ .compatible = "smi,sm501", },
{ /* end */ }
};
MODULE_DEVICE_TABLE(of, of_sm501_match_tbl);
static struct platform_driver sm501_plat_driver = {
.driver = {
.name = "sm501",
.of_match_table = of_sm501_match_tbl,
},
.probe = sm501_plat_probe,
.remove_new = sm501_plat_remove,
.suspend = pm_sleep_ptr(sm501_plat_suspend),
.resume = pm_sleep_ptr(sm501_plat_resume),
};
static int __init sm501_base_init(void)
{
int ret;
ret = platform_driver_register(&sm501_plat_driver);
if (ret < 0)
return ret;
return pci_register_driver(&sm501_pci_driver);
}
static void __exit sm501_base_exit(void)
{
platform_driver_unregister(&sm501_plat_driver);
pci_unregister_driver(&sm501_pci_driver);
}
module_init(sm501_base_init);
module_exit(sm501_base_exit);
MODULE_DESCRIPTION("SM501 Core Driver");
MODULE_AUTHOR("Ben Dooks <[email protected]>, Vincent Sanders");
MODULE_LICENSE("GPL v2");
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