| /* linux/drivers/mfd/sm501.c |
| * |
| * Copyright (C) 2006 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * Vincent Sanders <vince@simtec.co.uk> |
| * |
| * 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/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 == NULL) { |
| dev_err(sm->dev, "gpio: failed to request region\n"); |
| return -ENXIO; |
| } |
| |
| gpio->regs = ioremap(iobase, 0x20); |
| if (gpio->regs == NULL) { |
| 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_resource(gpio->regs_res); |
| kfree(gpio->regs_res); |
| |
| return ret; |
| } |
| |
| static void sm501_gpio_remove(struct sm501_devdata *sm) |
| { |
| struct sm501_gpio *gpio = &sm->gpio; |
| |
| if (!sm->gpio.registered) |
| return; |
| |
| gpiochip_remove(&gpio->low.gpio); |
| gpiochip_remove(&gpio->high.gpio); |
| |
| iounmap(gpio->regs); |
| release_resource(gpio->regs_res); |
| kfree(gpio->regs_res); |
| } |
| |
| static inline int sm501_gpio_pin2nr(struct sm501_devdata *sm, unsigned int pin) |
| { |
| struct sm501_gpio *gpio = &sm->gpio; |
| int base = (pin < 32) ? gpio->low.gpio.base : gpio->high.gpio.base; |
| |
| return (pin % 32) + base; |
| } |
| |
| 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_pin2nr(struct sm501_devdata *sm, unsigned int pin) |
| { |
| return -1; |
| } |
| |
| 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; |
| |
| pdev = sm501_create_subdev(sm, "i2c-gpio", 0, |
| sizeof(struct i2c_gpio_platform_data)); |
| if (!pdev) |
| return -ENOMEM; |
| |
| icd = dev_get_platdata(&pdev->dev); |
| |
| /* We keep the pin_sda and pin_scl fields relative in case the |
| * same platform data is passed to >1 SM501. |
| */ |
| |
| icd->sda_pin = sm501_gpio_pin2nr(sm, iic->pin_sda); |
| icd->scl_pin = sm501_gpio_pin2nr(sm, iic->pin_scl); |
| 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 (%d), scl=%d (%d)\n", |
| iic->bus_num, |
| icd->sda_pin, iic->pin_sda, icd->scl_pin, 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; |
| } |
| |
| /* sm501_dbg_regs |
| * |
| * Debug attribute to attach to parent device to show core registers |
| */ |
| |
| static ssize_t sm501_dbg_regs(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(dbg_regs, 0444, sm501_dbg_regs, NULL); |
| |
| /* 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 != NULL && 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(struct sm501_devdata), GFP_KERNEL); |
| if (sm == NULL) { |
| dev_err(&dev->dev, "no memory for device data\n"); |
| 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) { |
| dev_err(&dev->dev, "failed to get irq resource\n"); |
| 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 == NULL || sm->mem_res == NULL) { |
| 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 == NULL) { |
| 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 == NULL) { |
| dev_err(&dev->dev, "cannot remap registers\n"); |
| ret = -EIO; |
| goto err_claim; |
| } |
| |
| return sm501_init_dev(sm); |
| |
| err_claim: |
| release_resource(sm->regs_claim); |
| kfree(sm->regs_claim); |
| err_res: |
| kfree(sm); |
| err1: |
| return ret; |
| |
| } |
| |
| #ifdef CONFIG_PM |
| |
| /* power management support */ |
| |
| static void sm501_set_power(struct sm501_devdata *sm, int on) |
| { |
| struct sm501_platdata *pd = sm->platdata; |
| |
| if (pd == NULL) |
| 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; |
| } |
| #else |
| #define sm501_plat_suspend NULL |
| #define sm501_plat_resume NULL |
| #endif |
| |
| /* 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(struct sm501_devdata), GFP_KERNEL); |
| if (sm == NULL) { |
| dev_err(&dev->dev, "no memory for device data\n"); |
| 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 == NULL) { |
| dev_err(&dev->dev, "cannot claim registers\n"); |
| err= -EBUSY; |
| goto err3; |
| } |
| |
| sm->regs = pci_ioremap_bar(dev, 1); |
| |
| if (sm->regs == NULL) { |
| dev_err(&dev->dev, "cannot remap registers\n"); |
| err = -EIO; |
| goto err4; |
| } |
| |
| sm501_init_dev(sm); |
| return 0; |
| |
| err4: |
| release_resource(sm->regs_claim); |
| kfree(sm->regs_claim); |
| 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_resource(sm->regs_claim); |
| kfree(sm->regs_claim); |
| |
| pci_disable_device(dev); |
| } |
| |
| static int sm501_plat_remove(struct platform_device *dev) |
| { |
| struct sm501_devdata *sm = platform_get_drvdata(dev); |
| |
| sm501_dev_remove(sm); |
| iounmap(sm->regs); |
| |
| release_resource(sm->regs_claim); |
| kfree(sm->regs_claim); |
| |
| return 0; |
| } |
| |
| 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 = sm501_plat_remove, |
| .suspend = sm501_plat_suspend, |
| .resume = sm501_plat_resume, |
| }; |
| |
| static int __init sm501_base_init(void) |
| { |
| platform_driver_register(&sm501_plat_driver); |
| 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 <ben@simtec.co.uk>, Vincent Sanders"); |
| MODULE_LICENSE("GPL v2"); |