| /* |
| * intel_mid_sfi.c: Intel MID SFI initialization code |
| * |
| * (C) Copyright 2013 Intel Corporation |
| * Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; version 2 |
| * of the License. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/interrupt.h> |
| #include <linux/scatterlist.h> |
| #include <linux/sfi.h> |
| #include <linux/intel_pmic_gpio.h> |
| #include <linux/spi/spi.h> |
| #include <linux/i2c.h> |
| #include <linux/skbuff.h> |
| #include <linux/gpio.h> |
| #include <linux/gpio_keys.h> |
| #include <linux/input.h> |
| #include <linux/platform_device.h> |
| #include <linux/irq.h> |
| #include <linux/module.h> |
| #include <linux/notifier.h> |
| #include <linux/mmc/core.h> |
| #include <linux/mmc/card.h> |
| #include <linux/blkdev.h> |
| |
| #include <asm/setup.h> |
| #include <asm/mpspec_def.h> |
| #include <asm/hw_irq.h> |
| #include <asm/apic.h> |
| #include <asm/io_apic.h> |
| #include <asm/intel-mid.h> |
| #include <asm/intel_mid_vrtc.h> |
| #include <asm/io.h> |
| #include <asm/i8259.h> |
| #include <asm/intel_scu_ipc.h> |
| #include <asm/apb_timer.h> |
| #include <asm/reboot.h> |
| |
| #define SFI_SIG_OEM0 "OEM0" |
| #define MAX_IPCDEVS 24 |
| #define MAX_SCU_SPI 24 |
| #define MAX_SCU_I2C 24 |
| |
| static struct platform_device *ipc_devs[MAX_IPCDEVS]; |
| static struct spi_board_info *spi_devs[MAX_SCU_SPI]; |
| static struct i2c_board_info *i2c_devs[MAX_SCU_I2C]; |
| static struct sfi_gpio_table_entry *gpio_table; |
| static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM]; |
| static int ipc_next_dev; |
| static int spi_next_dev; |
| static int i2c_next_dev; |
| static int i2c_bus[MAX_SCU_I2C]; |
| static int gpio_num_entry; |
| static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM]; |
| int sfi_mrtc_num; |
| int sfi_mtimer_num; |
| |
| struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX]; |
| EXPORT_SYMBOL_GPL(sfi_mrtc_array); |
| |
| struct blocking_notifier_head intel_scu_notifier = |
| BLOCKING_NOTIFIER_INIT(intel_scu_notifier); |
| EXPORT_SYMBOL_GPL(intel_scu_notifier); |
| |
| #define intel_mid_sfi_get_pdata(dev, priv) \ |
| ((dev)->get_platform_data ? (dev)->get_platform_data(priv) : NULL) |
| |
| /* parse all the mtimer info to a static mtimer array */ |
| int __init sfi_parse_mtmr(struct sfi_table_header *table) |
| { |
| struct sfi_table_simple *sb; |
| struct sfi_timer_table_entry *pentry; |
| struct mpc_intsrc mp_irq; |
| int totallen; |
| |
| sb = (struct sfi_table_simple *)table; |
| if (!sfi_mtimer_num) { |
| sfi_mtimer_num = SFI_GET_NUM_ENTRIES(sb, |
| struct sfi_timer_table_entry); |
| pentry = (struct sfi_timer_table_entry *) sb->pentry; |
| totallen = sfi_mtimer_num * sizeof(*pentry); |
| memcpy(sfi_mtimer_array, pentry, totallen); |
| } |
| |
| pr_debug("SFI MTIMER info (num = %d):\n", sfi_mtimer_num); |
| pentry = sfi_mtimer_array; |
| for (totallen = 0; totallen < sfi_mtimer_num; totallen++, pentry++) { |
| pr_debug("timer[%d]: paddr = 0x%08x, freq = %dHz, irq = %d\n", |
| totallen, (u32)pentry->phys_addr, |
| pentry->freq_hz, pentry->irq); |
| mp_irq.type = MP_INTSRC; |
| mp_irq.irqtype = mp_INT; |
| /* triggering mode edge bit 2-3, active high polarity bit 0-1 */ |
| mp_irq.irqflag = 5; |
| mp_irq.srcbus = MP_BUS_ISA; |
| mp_irq.srcbusirq = pentry->irq; /* IRQ */ |
| mp_irq.dstapic = MP_APIC_ALL; |
| mp_irq.dstirq = pentry->irq; |
| mp_save_irq(&mp_irq); |
| mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC, NULL); |
| } |
| |
| return 0; |
| } |
| |
| struct sfi_timer_table_entry *sfi_get_mtmr(int hint) |
| { |
| int i; |
| if (hint < sfi_mtimer_num) { |
| if (!sfi_mtimer_usage[hint]) { |
| pr_debug("hint taken for timer %d irq %d\n", |
| hint, sfi_mtimer_array[hint].irq); |
| sfi_mtimer_usage[hint] = 1; |
| return &sfi_mtimer_array[hint]; |
| } |
| } |
| /* take the first timer available */ |
| for (i = 0; i < sfi_mtimer_num;) { |
| if (!sfi_mtimer_usage[i]) { |
| sfi_mtimer_usage[i] = 1; |
| return &sfi_mtimer_array[i]; |
| } |
| i++; |
| } |
| return NULL; |
| } |
| |
| void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr) |
| { |
| int i; |
| for (i = 0; i < sfi_mtimer_num;) { |
| if (mtmr->irq == sfi_mtimer_array[i].irq) { |
| sfi_mtimer_usage[i] = 0; |
| return; |
| } |
| i++; |
| } |
| } |
| |
| /* parse all the mrtc info to a global mrtc array */ |
| int __init sfi_parse_mrtc(struct sfi_table_header *table) |
| { |
| struct sfi_table_simple *sb; |
| struct sfi_rtc_table_entry *pentry; |
| struct mpc_intsrc mp_irq; |
| |
| int totallen; |
| |
| sb = (struct sfi_table_simple *)table; |
| if (!sfi_mrtc_num) { |
| sfi_mrtc_num = SFI_GET_NUM_ENTRIES(sb, |
| struct sfi_rtc_table_entry); |
| pentry = (struct sfi_rtc_table_entry *)sb->pentry; |
| totallen = sfi_mrtc_num * sizeof(*pentry); |
| memcpy(sfi_mrtc_array, pentry, totallen); |
| } |
| |
| pr_debug("SFI RTC info (num = %d):\n", sfi_mrtc_num); |
| pentry = sfi_mrtc_array; |
| for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) { |
| pr_debug("RTC[%d]: paddr = 0x%08x, irq = %d\n", |
| totallen, (u32)pentry->phys_addr, pentry->irq); |
| mp_irq.type = MP_INTSRC; |
| mp_irq.irqtype = mp_INT; |
| mp_irq.irqflag = 0xf; /* level trigger and active low */ |
| mp_irq.srcbus = MP_BUS_ISA; |
| mp_irq.srcbusirq = pentry->irq; /* IRQ */ |
| mp_irq.dstapic = MP_APIC_ALL; |
| mp_irq.dstirq = pentry->irq; |
| mp_save_irq(&mp_irq); |
| mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC, NULL); |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * Parsing GPIO table first, since the DEVS table will need this table |
| * to map the pin name to the actual pin. |
| */ |
| static int __init sfi_parse_gpio(struct sfi_table_header *table) |
| { |
| struct sfi_table_simple *sb; |
| struct sfi_gpio_table_entry *pentry; |
| int num, i; |
| |
| if (gpio_table) |
| return 0; |
| sb = (struct sfi_table_simple *)table; |
| num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry); |
| pentry = (struct sfi_gpio_table_entry *)sb->pentry; |
| |
| gpio_table = kmalloc(num * sizeof(*pentry), GFP_KERNEL); |
| if (!gpio_table) |
| return -1; |
| memcpy(gpio_table, pentry, num * sizeof(*pentry)); |
| gpio_num_entry = num; |
| |
| pr_debug("GPIO pin info:\n"); |
| for (i = 0; i < num; i++, pentry++) |
| pr_debug("info[%2d]: controller = %16.16s, pin_name = %16.16s," |
| " pin = %d\n", i, |
| pentry->controller_name, |
| pentry->pin_name, |
| pentry->pin_no); |
| return 0; |
| } |
| |
| int get_gpio_by_name(const char *name) |
| { |
| struct sfi_gpio_table_entry *pentry = gpio_table; |
| int i; |
| |
| if (!pentry) |
| return -1; |
| for (i = 0; i < gpio_num_entry; i++, pentry++) { |
| if (!strncmp(name, pentry->pin_name, SFI_NAME_LEN)) |
| return pentry->pin_no; |
| } |
| return -EINVAL; |
| } |
| |
| void __init intel_scu_device_register(struct platform_device *pdev) |
| { |
| if (ipc_next_dev == MAX_IPCDEVS) |
| pr_err("too many SCU IPC devices"); |
| else |
| ipc_devs[ipc_next_dev++] = pdev; |
| } |
| |
| static void __init intel_scu_spi_device_register(struct spi_board_info *sdev) |
| { |
| struct spi_board_info *new_dev; |
| |
| if (spi_next_dev == MAX_SCU_SPI) { |
| pr_err("too many SCU SPI devices"); |
| return; |
| } |
| |
| new_dev = kzalloc(sizeof(*sdev), GFP_KERNEL); |
| if (!new_dev) { |
| pr_err("failed to alloc mem for delayed spi dev %s\n", |
| sdev->modalias); |
| return; |
| } |
| *new_dev = *sdev; |
| |
| spi_devs[spi_next_dev++] = new_dev; |
| } |
| |
| static void __init intel_scu_i2c_device_register(int bus, |
| struct i2c_board_info *idev) |
| { |
| struct i2c_board_info *new_dev; |
| |
| if (i2c_next_dev == MAX_SCU_I2C) { |
| pr_err("too many SCU I2C devices"); |
| return; |
| } |
| |
| new_dev = kzalloc(sizeof(*idev), GFP_KERNEL); |
| if (!new_dev) { |
| pr_err("failed to alloc mem for delayed i2c dev %s\n", |
| idev->type); |
| return; |
| } |
| *new_dev = *idev; |
| |
| i2c_bus[i2c_next_dev] = bus; |
| i2c_devs[i2c_next_dev++] = new_dev; |
| } |
| |
| /* Called by IPC driver */ |
| void intel_scu_devices_create(void) |
| { |
| int i; |
| |
| for (i = 0; i < ipc_next_dev; i++) |
| platform_device_add(ipc_devs[i]); |
| |
| for (i = 0; i < spi_next_dev; i++) |
| spi_register_board_info(spi_devs[i], 1); |
| |
| for (i = 0; i < i2c_next_dev; i++) { |
| struct i2c_adapter *adapter; |
| struct i2c_client *client; |
| |
| adapter = i2c_get_adapter(i2c_bus[i]); |
| if (adapter) { |
| client = i2c_new_device(adapter, i2c_devs[i]); |
| if (!client) |
| pr_err("can't create i2c device %s\n", |
| i2c_devs[i]->type); |
| } else |
| i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1); |
| } |
| intel_scu_notifier_post(SCU_AVAILABLE, NULL); |
| } |
| EXPORT_SYMBOL_GPL(intel_scu_devices_create); |
| |
| /* Called by IPC driver */ |
| void intel_scu_devices_destroy(void) |
| { |
| int i; |
| |
| intel_scu_notifier_post(SCU_DOWN, NULL); |
| |
| for (i = 0; i < ipc_next_dev; i++) |
| platform_device_del(ipc_devs[i]); |
| } |
| EXPORT_SYMBOL_GPL(intel_scu_devices_destroy); |
| |
| static void __init install_irq_resource(struct platform_device *pdev, int irq) |
| { |
| /* Single threaded */ |
| static struct resource res __initdata = { |
| .name = "IRQ", |
| .flags = IORESOURCE_IRQ, |
| }; |
| res.start = irq; |
| platform_device_add_resources(pdev, &res, 1); |
| } |
| |
| static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *pentry, |
| struct devs_id *dev) |
| { |
| struct platform_device *pdev; |
| void *pdata = NULL; |
| |
| pr_debug("IPC bus, name = %16.16s, irq = 0x%2x\n", |
| pentry->name, pentry->irq); |
| pdata = intel_mid_sfi_get_pdata(dev, pentry); |
| if (IS_ERR(pdata)) |
| return; |
| |
| pdev = platform_device_alloc(pentry->name, 0); |
| if (pdev == NULL) { |
| pr_err("out of memory for SFI platform device '%s'.\n", |
| pentry->name); |
| return; |
| } |
| install_irq_resource(pdev, pentry->irq); |
| |
| pdev->dev.platform_data = pdata; |
| platform_device_add(pdev); |
| } |
| |
| static void __init sfi_handle_spi_dev(struct sfi_device_table_entry *pentry, |
| struct devs_id *dev) |
| { |
| struct spi_board_info spi_info; |
| void *pdata = NULL; |
| |
| memset(&spi_info, 0, sizeof(spi_info)); |
| strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN); |
| spi_info.irq = ((pentry->irq == (u8)0xff) ? 0 : pentry->irq); |
| spi_info.bus_num = pentry->host_num; |
| spi_info.chip_select = pentry->addr; |
| spi_info.max_speed_hz = pentry->max_freq; |
| pr_debug("SPI bus=%d, name=%16.16s, irq=0x%2x, max_freq=%d, cs=%d\n", |
| spi_info.bus_num, |
| spi_info.modalias, |
| spi_info.irq, |
| spi_info.max_speed_hz, |
| spi_info.chip_select); |
| |
| pdata = intel_mid_sfi_get_pdata(dev, &spi_info); |
| if (IS_ERR(pdata)) |
| return; |
| |
| spi_info.platform_data = pdata; |
| if (dev->delay) |
| intel_scu_spi_device_register(&spi_info); |
| else |
| spi_register_board_info(&spi_info, 1); |
| } |
| |
| static void __init sfi_handle_i2c_dev(struct sfi_device_table_entry *pentry, |
| struct devs_id *dev) |
| { |
| struct i2c_board_info i2c_info; |
| void *pdata = NULL; |
| |
| memset(&i2c_info, 0, sizeof(i2c_info)); |
| strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN); |
| i2c_info.irq = ((pentry->irq == (u8)0xff) ? 0 : pentry->irq); |
| i2c_info.addr = pentry->addr; |
| pr_debug("I2C bus = %d, name = %16.16s, irq = 0x%2x, addr = 0x%x\n", |
| pentry->host_num, |
| i2c_info.type, |
| i2c_info.irq, |
| i2c_info.addr); |
| pdata = intel_mid_sfi_get_pdata(dev, &i2c_info); |
| i2c_info.platform_data = pdata; |
| if (IS_ERR(pdata)) |
| return; |
| |
| if (dev->delay) |
| intel_scu_i2c_device_register(pentry->host_num, &i2c_info); |
| else |
| i2c_register_board_info(pentry->host_num, &i2c_info, 1); |
| } |
| |
| extern struct devs_id *const __x86_intel_mid_dev_start[], |
| *const __x86_intel_mid_dev_end[]; |
| |
| static struct devs_id __init *get_device_id(u8 type, char *name) |
| { |
| struct devs_id *const *dev_table; |
| |
| for (dev_table = __x86_intel_mid_dev_start; |
| dev_table < __x86_intel_mid_dev_end; dev_table++) { |
| struct devs_id *dev = *dev_table; |
| if (dev->type == type && |
| !strncmp(dev->name, name, SFI_NAME_LEN)) { |
| return dev; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static int __init sfi_parse_devs(struct sfi_table_header *table) |
| { |
| struct sfi_table_simple *sb; |
| struct sfi_device_table_entry *pentry; |
| struct devs_id *dev = NULL; |
| int num, i, ret; |
| int polarity; |
| struct irq_alloc_info info; |
| |
| sb = (struct sfi_table_simple *)table; |
| num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry); |
| pentry = (struct sfi_device_table_entry *)sb->pentry; |
| |
| for (i = 0; i < num; i++, pentry++) { |
| int irq = pentry->irq; |
| |
| if (irq != (u8)0xff) { /* native RTE case */ |
| /* these SPI2 devices are not exposed to system as PCI |
| * devices, but they have separate RTE entry in IOAPIC |
| * so we have to enable them one by one here |
| */ |
| if (intel_mid_identify_cpu() == |
| INTEL_MID_CPU_CHIP_TANGIER) { |
| if (!strncmp(pentry->name, "r69001-ts-i2c", 13)) |
| /* active low */ |
| polarity = 1; |
| else if (!strncmp(pentry->name, |
| "synaptics_3202", 14)) |
| /* active low */ |
| polarity = 1; |
| else if (irq == 41) |
| /* fast_int_1 */ |
| polarity = 1; |
| else |
| /* active high */ |
| polarity = 0; |
| } else { |
| /* PNW and CLV go with active low */ |
| polarity = 1; |
| } |
| |
| ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, polarity); |
| ret = mp_set_gsi_attr(irq, 1, polarity, NUMA_NO_NODE); |
| if (ret == 0) |
| ret = mp_map_gsi_to_irq(irq, IOAPIC_MAP_ALLOC, |
| &info); |
| WARN_ON(ret < 0); |
| } |
| |
| dev = get_device_id(pentry->type, pentry->name); |
| |
| if (!dev) |
| continue; |
| |
| if (dev->device_handler) { |
| dev->device_handler(pentry, dev); |
| } else { |
| switch (pentry->type) { |
| case SFI_DEV_TYPE_IPC: |
| sfi_handle_ipc_dev(pentry, dev); |
| break; |
| case SFI_DEV_TYPE_SPI: |
| sfi_handle_spi_dev(pentry, dev); |
| break; |
| case SFI_DEV_TYPE_I2C: |
| sfi_handle_i2c_dev(pentry, dev); |
| break; |
| case SFI_DEV_TYPE_UART: |
| case SFI_DEV_TYPE_HSI: |
| default: |
| break; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| static int __init intel_mid_platform_init(void) |
| { |
| sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, sfi_parse_gpio); |
| sfi_table_parse(SFI_SIG_DEVS, NULL, NULL, sfi_parse_devs); |
| return 0; |
| } |
| arch_initcall(intel_mid_platform_init); |