/* * driver/mfd/asic3.c * * Compaq ASIC3 support. * * 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. * * Copyright 2001 Compaq Computer Corporation. * Copyright 2004-2005 Phil Blundell * Copyright 2007-2008 OpenedHand Ltd. * * Authors: Phil Blundell <pb@handhelds.org>, * Samuel Ortiz <sameo@openedhand.com> * */ #include <linux/kernel.h> #include <linux/delay.h> #include <linux/irq.h> #include <linux/gpio.h> #include <linux/export.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/platform_device.h> #include <linux/mfd/asic3.h> #include <linux/mfd/core.h> #include <linux/mfd/ds1wm.h> #include <linux/mfd/tmio.h> #include <linux/mmc/host.h> enum { ASIC3_CLOCK_SPI, ASIC3_CLOCK_OWM, ASIC3_CLOCK_PWM0, ASIC3_CLOCK_PWM1, ASIC3_CLOCK_LED0, ASIC3_CLOCK_LED1, ASIC3_CLOCK_LED2, ASIC3_CLOCK_SD_HOST, ASIC3_CLOCK_SD_BUS, ASIC3_CLOCK_SMBUS, ASIC3_CLOCK_EX0, ASIC3_CLOCK_EX1, }; struct asic3_clk { int enabled; unsigned int cdex; unsigned long rate; }; #define INIT_CDEX(_name, _rate) \ [ASIC3_CLOCK_##_name] = { \ .cdex = CLOCK_CDEX_##_name, \ .rate = _rate, \ } static struct asic3_clk asic3_clk_init[] __initdata = { INIT_CDEX(SPI, 0), INIT_CDEX(OWM, 5000000), INIT_CDEX(PWM0, 0), INIT_CDEX(PWM1, 0), INIT_CDEX(LED0, 0), INIT_CDEX(LED1, 0), INIT_CDEX(LED2, 0), INIT_CDEX(SD_HOST, 24576000), INIT_CDEX(SD_BUS, 12288000), INIT_CDEX(SMBUS, 0), INIT_CDEX(EX0, 32768), INIT_CDEX(EX1, 24576000), }; struct asic3 { void __iomem *mapping; unsigned int bus_shift; unsigned int irq_nr; unsigned int irq_base; raw_spinlock_t lock; u16 irq_bothedge[4]; struct gpio_chip gpio; struct device *dev; void __iomem *tmio_cnf; struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)]; }; static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset); void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value) { iowrite16(value, asic->mapping + (reg >> asic->bus_shift)); } EXPORT_SYMBOL_GPL(asic3_write_register); u32 asic3_read_register(struct asic3 *asic, unsigned int reg) { return ioread16(asic->mapping + (reg >> asic->bus_shift)); } EXPORT_SYMBOL_GPL(asic3_read_register); static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set) { unsigned long flags; u32 val; raw_spin_lock_irqsave(&asic->lock, flags); val = asic3_read_register(asic, reg); if (set) val |= bits; else val &= ~bits; asic3_write_register(asic, reg, val); raw_spin_unlock_irqrestore(&asic->lock, flags); } /* IRQs */ #define MAX_ASIC_ISR_LOOPS 20 #define ASIC3_GPIO_BASE_INCR \ (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE) static void asic3_irq_flip_edge(struct asic3 *asic, u32 base, int bit) { u16 edge; unsigned long flags; raw_spin_lock_irqsave(&asic->lock, flags); edge = asic3_read_register(asic, base + ASIC3_GPIO_EDGE_TRIGGER); edge ^= bit; asic3_write_register(asic, base + ASIC3_GPIO_EDGE_TRIGGER, edge); raw_spin_unlock_irqrestore(&asic->lock, flags); } static void asic3_irq_demux(struct irq_desc *desc) { struct asic3 *asic = irq_desc_get_handler_data(desc); struct irq_data *data = irq_desc_get_irq_data(desc); int iter, i; unsigned long flags; data->chip->irq_ack(data); for (iter = 0 ; iter < MAX_ASIC_ISR_LOOPS; iter++) { u32 status; int bank; raw_spin_lock_irqsave(&asic->lock, flags); status = asic3_read_register(asic, ASIC3_OFFSET(INTR, P_INT_STAT)); raw_spin_unlock_irqrestore(&asic->lock, flags); /* Check all ten register bits */ if ((status & 0x3ff) == 0) break; /* Handle GPIO IRQs */ for (bank = 0; bank < ASIC3_NUM_GPIO_BANKS; bank++) { if (status & (1 << bank)) { unsigned long base, istat; base = ASIC3_GPIO_A_BASE + bank * ASIC3_GPIO_BASE_INCR; raw_spin_lock_irqsave(&asic->lock, flags); istat = asic3_read_register(asic, base + ASIC3_GPIO_INT_STATUS); /* Clearing IntStatus */ asic3_write_register(asic, base + ASIC3_GPIO_INT_STATUS, 0); raw_spin_unlock_irqrestore(&asic->lock, flags); for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) { int bit = (1 << i); unsigned int irqnr; if (!(istat & bit)) continue; irqnr = asic->irq_base + (ASIC3_GPIOS_PER_BANK * bank) + i; generic_handle_irq(irqnr); if (asic->irq_bothedge[bank] & bit) asic3_irq_flip_edge(asic, base, bit); } } } /* Handle remaining IRQs in the status register */ for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) { /* They start at bit 4 and go up */ if (status & (1 << (i - ASIC3_NUM_GPIOS + 4))) generic_handle_irq(asic->irq_base + i); } } if (iter >= MAX_ASIC_ISR_LOOPS) dev_err(asic->dev, "interrupt processing overrun\n"); } static inline int asic3_irq_to_bank(struct asic3 *asic, int irq) { int n; n = (irq - asic->irq_base) >> 4; return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE)); } static inline int asic3_irq_to_index(struct asic3 *asic, int irq) { return (irq - asic->irq_base) & 0xf; } static void asic3_mask_gpio_irq(struct irq_data *data) { struct asic3 *asic = irq_data_get_irq_chip_data(data); u32 val, bank, index; unsigned long flags; bank = asic3_irq_to_bank(asic, data->irq); index = asic3_irq_to_index(asic, data->irq); raw_spin_lock_irqsave(&asic->lock, flags); val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK); val |= 1 << index; asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val); raw_spin_unlock_irqrestore(&asic->lock, flags); } static void asic3_mask_irq(struct irq_data *data) { struct asic3 *asic = irq_data_get_irq_chip_data(data); int regval; unsigned long flags; raw_spin_lock_irqsave(&asic->lock, flags); regval = asic3_read_register(asic, ASIC3_INTR_BASE + ASIC3_INTR_INT_MASK); regval &= ~(ASIC3_INTMASK_MASK0 << (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS))); asic3_write_register(asic, ASIC3_INTR_BASE + ASIC3_INTR_INT_MASK, regval); raw_spin_unlock_irqrestore(&asic->lock, flags); } static void asic3_unmask_gpio_irq(struct irq_data *data) { struct asic3 *asic = irq_data_get_irq_chip_data(data); u32 val, bank, index; unsigned long flags; bank = asic3_irq_to_bank(asic, data->irq); index = asic3_irq_to_index(asic, data->irq); raw_spin_lock_irqsave(&asic->lock, flags); val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK); val &= ~(1 << index); asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val); raw_spin_unlock_irqrestore(&asic->lock, flags); } static void asic3_unmask_irq(struct irq_data *data) { struct asic3 *asic = irq_data_get_irq_chip_data(data); int regval; unsigned long flags; raw_spin_lock_irqsave(&asic->lock, flags); regval = asic3_read_register(asic, ASIC3_INTR_BASE + ASIC3_INTR_INT_MASK); regval |= (ASIC3_INTMASK_MASK0 << (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS))); asic3_write_register(asic, ASIC3_INTR_BASE + ASIC3_INTR_INT_MASK, regval); raw_spin_unlock_irqrestore(&asic->lock, flags); } static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type) { struct asic3 *asic = irq_data_get_irq_chip_data(data); u32 bank, index; u16 trigger, level, edge, bit; unsigned long flags; bank = asic3_irq_to_bank(asic, data->irq); index = asic3_irq_to_index(asic, data->irq); bit = 1<<index; raw_spin_lock_irqsave(&asic->lock, flags); level = asic3_read_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER); edge = asic3_read_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER); trigger = asic3_read_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE); asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] &= ~bit; if (type == IRQ_TYPE_EDGE_RISING) { trigger |= bit; edge |= bit; } else if (type == IRQ_TYPE_EDGE_FALLING) { trigger |= bit; edge &= ~bit; } else if (type == IRQ_TYPE_EDGE_BOTH) { trigger |= bit; if (asic3_gpio_get(&asic->gpio, data->irq - asic->irq_base)) edge &= ~bit; else edge |= bit; asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] |= bit; } else if (type == IRQ_TYPE_LEVEL_LOW) { trigger &= ~bit; level &= ~bit; } else if (type == IRQ_TYPE_LEVEL_HIGH) { trigger &= ~bit; level |= bit; } else { /* * if type == IRQ_TYPE_NONE, we should mask interrupts, but * be careful to not unmask them if mask was also called. * Probably need internal state for mask. */ dev_notice(asic->dev, "irq type not changed\n"); } asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER, level); asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER, edge); asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE, trigger); raw_spin_unlock_irqrestore(&asic->lock, flags); return 0; } static int asic3_gpio_irq_set_wake(struct irq_data *data, unsigned int on) { struct asic3 *asic = irq_data_get_irq_chip_data(data); u32 bank, index; u16 bit; bank = asic3_irq_to_bank(asic, data->irq); index = asic3_irq_to_index(asic, data->irq); bit = 1<<index; asic3_set_register(asic, bank + ASIC3_GPIO_SLEEP_MASK, bit, !on); return 0; } static struct irq_chip asic3_gpio_irq_chip = { .name = "ASIC3-GPIO", .irq_ack = asic3_mask_gpio_irq, .irq_mask = asic3_mask_gpio_irq, .irq_unmask = asic3_unmask_gpio_irq, .irq_set_type = asic3_gpio_irq_type, .irq_set_wake = asic3_gpio_irq_set_wake, }; static struct irq_chip asic3_irq_chip = { .name = "ASIC3", .irq_ack = asic3_mask_irq, .irq_mask = asic3_mask_irq, .irq_unmask = asic3_unmask_irq, }; static int __init asic3_irq_probe(struct platform_device *pdev) { struct asic3 *asic = platform_get_drvdata(pdev); unsigned long clksel = 0; unsigned int irq, irq_base; int ret; ret = platform_get_irq(pdev, 0); if (ret < 0) return ret; asic->irq_nr = ret; /* turn on clock to IRQ controller */ clksel |= CLOCK_SEL_CX; asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel); irq_base = asic->irq_base; for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) { if (irq < asic->irq_base + ASIC3_NUM_GPIOS) irq_set_chip(irq, &asic3_gpio_irq_chip); else irq_set_chip(irq, &asic3_irq_chip); irq_set_chip_data(irq, asic); irq_set_handler(irq, handle_level_irq); irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); } asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK), ASIC3_INTMASK_GINTMASK); irq_set_chained_handler_and_data(asic->irq_nr, asic3_irq_demux, asic); irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING); return 0; } static void asic3_irq_remove(struct platform_device *pdev) { struct asic3 *asic = platform_get_drvdata(pdev); unsigned int irq, irq_base; irq_base = asic->irq_base; for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) { irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); irq_set_chip_and_handler(irq, NULL, NULL); irq_set_chip_data(irq, NULL); } irq_set_chained_handler(asic->irq_nr, NULL); } /* GPIOs */ static int asic3_gpio_direction(struct gpio_chip *chip, unsigned offset, int out) { u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg; unsigned int gpio_base; unsigned long flags; struct asic3 *asic; asic = gpiochip_get_data(chip); gpio_base = ASIC3_GPIO_TO_BASE(offset); if (gpio_base > ASIC3_GPIO_D_BASE) { dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n", gpio_base, offset); return -EINVAL; } raw_spin_lock_irqsave(&asic->lock, flags); out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION); /* Input is 0, Output is 1 */ if (out) out_reg |= mask; else out_reg &= ~mask; asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg); raw_spin_unlock_irqrestore(&asic->lock, flags); return 0; } static int asic3_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { return asic3_gpio_direction(chip, offset, 0); } static int asic3_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { return asic3_gpio_direction(chip, offset, 1); } static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset) { unsigned int gpio_base; u32 mask = ASIC3_GPIO_TO_MASK(offset); struct asic3 *asic; asic = gpiochip_get_data(chip); gpio_base = ASIC3_GPIO_TO_BASE(offset); if (gpio_base > ASIC3_GPIO_D_BASE) { dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n", gpio_base, offset); return -EINVAL; } return !!(asic3_read_register(asic, gpio_base + ASIC3_GPIO_STATUS) & mask); } static void asic3_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { u32 mask, out_reg; unsigned int gpio_base; unsigned long flags; struct asic3 *asic; asic = gpiochip_get_data(chip); gpio_base = ASIC3_GPIO_TO_BASE(offset); if (gpio_base > ASIC3_GPIO_D_BASE) { dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n", gpio_base, offset); return; } mask = ASIC3_GPIO_TO_MASK(offset); raw_spin_lock_irqsave(&asic->lock, flags); out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT); if (value) out_reg |= mask; else out_reg &= ~mask; asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg); raw_spin_unlock_irqrestore(&asic->lock, flags); } static int asic3_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { struct asic3 *asic = gpiochip_get_data(chip); return asic->irq_base + offset; } static __init int asic3_gpio_probe(struct platform_device *pdev, u16 *gpio_config, int num) { struct asic3 *asic = platform_get_drvdata(pdev); u16 alt_reg[ASIC3_NUM_GPIO_BANKS]; u16 out_reg[ASIC3_NUM_GPIO_BANKS]; u16 dir_reg[ASIC3_NUM_GPIO_BANKS]; int i; memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16)); memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16)); memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16)); /* Enable all GPIOs */ asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff); asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff); asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff); asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff); for (i = 0; i < num; i++) { u8 alt, pin, dir, init, bank_num, bit_num; u16 config = gpio_config[i]; pin = ASIC3_CONFIG_GPIO_PIN(config); alt = ASIC3_CONFIG_GPIO_ALT(config); dir = ASIC3_CONFIG_GPIO_DIR(config); init = ASIC3_CONFIG_GPIO_INIT(config); bank_num = ASIC3_GPIO_TO_BANK(pin); bit_num = ASIC3_GPIO_TO_BIT(pin); alt_reg[bank_num] |= (alt << bit_num); out_reg[bank_num] |= (init << bit_num); dir_reg[bank_num] |= (dir << bit_num); } for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) { asic3_write_register(asic, ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_DIRECTION, dir_reg[i]); asic3_write_register(asic, ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT, out_reg[i]); asic3_write_register(asic, ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_ALT_FUNCTION, alt_reg[i]); } return gpiochip_add_data(&asic->gpio, asic); } static int asic3_gpio_remove(struct platform_device *pdev) { struct asic3 *asic = platform_get_drvdata(pdev); gpiochip_remove(&asic->gpio); return 0; } static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk) { unsigned long flags; u32 cdex; raw_spin_lock_irqsave(&asic->lock, flags); if (clk->enabled++ == 0) { cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX)); cdex |= clk->cdex; asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex); } raw_spin_unlock_irqrestore(&asic->lock, flags); } static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk) { unsigned long flags; u32 cdex; WARN_ON(clk->enabled == 0); raw_spin_lock_irqsave(&asic->lock, flags); if (--clk->enabled == 0) { cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX)); cdex &= ~clk->cdex; asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex); } raw_spin_unlock_irqrestore(&asic->lock, flags); } /* MFD cells (SPI, PWM, LED, DS1WM, MMC) */ static struct ds1wm_driver_data ds1wm_pdata = { .active_high = 1, .reset_recover_delay = 1, }; static struct resource ds1wm_resources[] = { { .start = ASIC3_OWM_BASE, .end = ASIC3_OWM_BASE + 0x13, .flags = IORESOURCE_MEM, }, { .start = ASIC3_IRQ_OWM, .end = ASIC3_IRQ_OWM, .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, }, }; static int ds1wm_enable(struct platform_device *pdev) { struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); /* Turn on external clocks and the OWM clock */ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]); usleep_range(1000, 5000); /* Reset and enable DS1WM */ asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET), ASIC3_EXTCF_OWM_RESET, 1); usleep_range(1000, 5000); asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET), ASIC3_EXTCF_OWM_RESET, 0); usleep_range(1000, 5000); asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), ASIC3_EXTCF_OWM_EN, 1); usleep_range(1000, 5000); return 0; } static int ds1wm_disable(struct platform_device *pdev) { struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), ASIC3_EXTCF_OWM_EN, 0); asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]); asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); return 0; } static const struct mfd_cell asic3_cell_ds1wm = { .name = "ds1wm", .enable = ds1wm_enable, .disable = ds1wm_disable, .platform_data = &ds1wm_pdata, .pdata_size = sizeof(ds1wm_pdata), .num_resources = ARRAY_SIZE(ds1wm_resources), .resources = ds1wm_resources, }; static void asic3_mmc_pwr(struct platform_device *pdev, int state) { struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state); } static void asic3_mmc_clk_div(struct platform_device *pdev, int state) { struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state); } static struct tmio_mmc_data asic3_mmc_data = { .hclk = 24576000, .ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, .set_pwr = asic3_mmc_pwr, .set_clk_div = asic3_mmc_clk_div, }; static struct resource asic3_mmc_resources[] = { { .start = ASIC3_SD_CTRL_BASE, .end = ASIC3_SD_CTRL_BASE + 0x3ff, .flags = IORESOURCE_MEM, }, { .start = 0, .end = 0, .flags = IORESOURCE_IRQ, }, }; static int asic3_mmc_enable(struct platform_device *pdev) { struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); /* Not sure if it must be done bit by bit, but leaving as-is */ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), ASIC3_SDHWCTRL_LEVCD, 1); asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), ASIC3_SDHWCTRL_LEVWP, 1); asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), ASIC3_SDHWCTRL_SUSPEND, 0); asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), ASIC3_SDHWCTRL_PCLR, 0); asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); /* CLK32 used for card detection and for interruption detection * when HCLK is stopped. */ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); usleep_range(1000, 5000); /* HCLK 24.576 MHz, BCLK 12.288 MHz: */ asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL); asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]); asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]); usleep_range(1000, 5000); asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), ASIC3_EXTCF_SD_MEM_ENABLE, 1); /* Enable SD card slot 3.3V power supply */ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), ASIC3_SDHWCTRL_SDPWR, 1); /* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */ tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift, ASIC3_SD_CTRL_BASE >> 1); return 0; } static int asic3_mmc_disable(struct platform_device *pdev) { struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); /* Put in suspend mode */ asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF), ASIC3_SDHWCTRL_SUSPEND, 1); /* Disable clocks */ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]); asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]); asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]); asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]); return 0; } static const struct mfd_cell asic3_cell_mmc = { .name = "tmio-mmc", .enable = asic3_mmc_enable, .disable = asic3_mmc_disable, .suspend = asic3_mmc_disable, .resume = asic3_mmc_enable, .platform_data = &asic3_mmc_data, .pdata_size = sizeof(asic3_mmc_data), .num_resources = ARRAY_SIZE(asic3_mmc_resources), .resources = asic3_mmc_resources, }; static const int clock_ledn[ASIC3_NUM_LEDS] = { [0] = ASIC3_CLOCK_LED0, [1] = ASIC3_CLOCK_LED1, [2] = ASIC3_CLOCK_LED2, }; static int asic3_leds_enable(struct platform_device *pdev) { const struct mfd_cell *cell = mfd_get_cell(pdev); struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]); return 0; } static int asic3_leds_disable(struct platform_device *pdev) { const struct mfd_cell *cell = mfd_get_cell(pdev); struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]); return 0; } static int asic3_leds_suspend(struct platform_device *pdev) { const struct mfd_cell *cell = mfd_get_cell(pdev); struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); while (asic3_gpio_get(&asic->gpio, ASIC3_GPIO(C, cell->id)) != 0) usleep_range(1000, 5000); asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]); return 0; } static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = { [0] = { .name = "leds-asic3", .id = 0, .enable = asic3_leds_enable, .disable = asic3_leds_disable, .suspend = asic3_leds_suspend, .resume = asic3_leds_enable, }, [1] = { .name = "leds-asic3", .id = 1, .enable = asic3_leds_enable, .disable = asic3_leds_disable, .suspend = asic3_leds_suspend, .resume = asic3_leds_enable, }, [2] = { .name = "leds-asic3", .id = 2, .enable = asic3_leds_enable, .disable = asic3_leds_disable, .suspend = asic3_leds_suspend, .resume = asic3_leds_enable, }, }; static int __init asic3_mfd_probe(struct platform_device *pdev, struct asic3_platform_data *pdata, struct resource *mem) { struct asic3 *asic = platform_get_drvdata(pdev); struct resource *mem_sdio; int irq, ret; mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (!mem_sdio) dev_dbg(asic->dev, "no SDIO MEM resource\n"); irq = platform_get_irq(pdev, 1); if (irq < 0) dev_dbg(asic->dev, "no SDIO IRQ resource\n"); /* DS1WM */ asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), ASIC3_EXTCF_OWM_SMB, 0); ds1wm_resources[0].start >>= asic->bus_shift; ds1wm_resources[0].end >>= asic->bus_shift; /* MMC */ if (mem_sdio) { asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >> asic->bus_shift) + mem_sdio->start, ASIC3_SD_CONFIG_SIZE >> asic->bus_shift); if (!asic->tmio_cnf) { ret = -ENOMEM; dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n"); goto out; } } asic3_mmc_resources[0].start >>= asic->bus_shift; asic3_mmc_resources[0].end >>= asic->bus_shift; if (pdata->clock_rate) { ds1wm_pdata.clock_rate = pdata->clock_rate; ret = mfd_add_devices(&pdev->dev, pdev->id, &asic3_cell_ds1wm, 1, mem, asic->irq_base, NULL); if (ret < 0) goto out_unmap; } if (mem_sdio && (irq >= 0)) { ret = mfd_add_devices(&pdev->dev, pdev->id, &asic3_cell_mmc, 1, mem_sdio, irq, NULL); if (ret < 0) goto out_unmap; } ret = 0; if (pdata->leds) { int i; for (i = 0; i < ASIC3_NUM_LEDS; ++i) { asic3_cell_leds[i].platform_data = &pdata->leds[i]; asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]); } ret = mfd_add_devices(&pdev->dev, 0, asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0, NULL); } return ret; out_unmap: if (asic->tmio_cnf) iounmap(asic->tmio_cnf); out: return ret; } static void asic3_mfd_remove(struct platform_device *pdev) { struct asic3 *asic = platform_get_drvdata(pdev); mfd_remove_devices(&pdev->dev); iounmap(asic->tmio_cnf); } /* Core */ static int __init asic3_probe(struct platform_device *pdev) { struct asic3_platform_data *pdata = dev_get_platdata(&pdev->dev); struct asic3 *asic; struct resource *mem; unsigned long clksel; int ret = 0; asic = devm_kzalloc(&pdev->dev, sizeof(struct asic3), GFP_KERNEL); if (!asic) return -ENOMEM; raw_spin_lock_init(&asic->lock); platform_set_drvdata(pdev, asic); asic->dev = &pdev->dev; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { dev_err(asic->dev, "no MEM resource\n"); return -ENOMEM; } asic->mapping = ioremap(mem->start, resource_size(mem)); if (!asic->mapping) { dev_err(asic->dev, "Couldn't ioremap\n"); return -ENOMEM; } asic->irq_base = pdata->irq_base; /* calculate bus shift from mem resource */ asic->bus_shift = 2 - (resource_size(mem) >> 12); clksel = 0; asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel); ret = asic3_irq_probe(pdev); if (ret < 0) { dev_err(asic->dev, "Couldn't probe IRQs\n"); goto out_unmap; } asic->gpio.label = "asic3"; asic->gpio.base = pdata->gpio_base; asic->gpio.ngpio = ASIC3_NUM_GPIOS; asic->gpio.get = asic3_gpio_get; asic->gpio.set = asic3_gpio_set; asic->gpio.direction_input = asic3_gpio_direction_input; asic->gpio.direction_output = asic3_gpio_direction_output; asic->gpio.to_irq = asic3_gpio_to_irq; ret = asic3_gpio_probe(pdev, pdata->gpio_config, pdata->gpio_config_num); if (ret < 0) { dev_err(asic->dev, "GPIO probe failed\n"); goto out_irq; } /* Making a per-device copy is only needed for the * theoretical case of multiple ASIC3s on one board: */ memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init)); asic3_mfd_probe(pdev, pdata, mem); asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 1); dev_info(asic->dev, "ASIC3 Core driver\n"); return 0; out_irq: asic3_irq_remove(pdev); out_unmap: iounmap(asic->mapping); return ret; } static int asic3_remove(struct platform_device *pdev) { int ret; struct asic3 *asic = platform_get_drvdata(pdev); asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), (ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 0); asic3_mfd_remove(pdev); ret = asic3_gpio_remove(pdev); if (ret < 0) return ret; asic3_irq_remove(pdev); asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0); iounmap(asic->mapping); return 0; } static void asic3_shutdown(struct platform_device *pdev) { } static struct platform_driver asic3_device_driver = { .driver = { .name = "asic3", }, .remove = asic3_remove, .shutdown = asic3_shutdown, }; static int __init asic3_init(void) { int retval = 0; retval = platform_driver_probe(&asic3_device_driver, asic3_probe); return retval; } subsys_initcall(asic3_init);