diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ata/pata_at91.c | 48 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 2 | ||||
| -rw-r--r-- | drivers/ide/Makefile | 1 | ||||
| -rw-r--r-- | drivers/ide/at91_ide.c | 366 | ||||
| -rw-r--r-- | drivers/rtc/rtc-at91sam9.c | 13 |
5 files changed, 32 insertions, 398 deletions
diff --git a/drivers/ata/pata_at91.c b/drivers/ata/pata_at91.c index a7d91a72ee35..53d3770a0b1b 100644 --- a/drivers/ata/pata_at91.c +++ b/drivers/ata/pata_at91.c @@ -207,11 +207,11 @@ static void set_smc_timing(struct device *dev, struct ata_device *adev, { int ret = 0; int use_iordy; + struct sam9_smc_config smc; unsigned int t6z; /* data tristate time in ns */ unsigned int cycle; /* SMC Cycle width in MCK ticks */ unsigned int setup; /* SMC Setup width in MCK ticks */ unsigned int pulse; /* CFIOR and CFIOW pulse width in MCK ticks */ - unsigned int cs_setup = 0;/* CS4 or CS5 setup width in MCK ticks */ unsigned int cs_pulse; /* CS4 or CS5 pulse width in MCK ticks*/ unsigned int tdf_cycles; /* SMC TDF MCK ticks */ unsigned long mck_hz; /* MCK frequency in Hz */ @@ -244,26 +244,20 @@ static void set_smc_timing(struct device *dev, struct ata_device *adev, } dev_dbg(dev, "Use IORDY=%u, TDF Cycles=%u\n", use_iordy, tdf_cycles); - info->mode |= AT91_SMC_TDF_(tdf_cycles); - - /* write SMC Setup Register */ - at91_sys_write(AT91_SMC_SETUP(info->cs), - AT91_SMC_NWESETUP_(setup) | - AT91_SMC_NRDSETUP_(setup) | - AT91_SMC_NCS_WRSETUP_(cs_setup) | - AT91_SMC_NCS_RDSETUP_(cs_setup)); - /* write SMC Pulse Register */ - at91_sys_write(AT91_SMC_PULSE(info->cs), - AT91_SMC_NWEPULSE_(pulse) | - AT91_SMC_NRDPULSE_(pulse) | - AT91_SMC_NCS_WRPULSE_(cs_pulse) | - AT91_SMC_NCS_RDPULSE_(cs_pulse)); - /* write SMC Cycle Register */ - at91_sys_write(AT91_SMC_CYCLE(info->cs), - AT91_SMC_NWECYCLE_(cycle) | - AT91_SMC_NRDCYCLE_(cycle)); - /* write SMC Mode Register*/ - at91_sys_write(AT91_SMC_MODE(info->cs), info->mode); + + /* SMC Setup Register */ + smc.nwe_setup = smc.nrd_setup = setup; + smc.ncs_write_setup = smc.ncs_read_setup = 0; + /* SMC Pulse Register */ + smc.nwe_pulse = smc.nrd_pulse = pulse; + smc.ncs_write_pulse = smc.ncs_read_pulse = cs_pulse; + /* SMC Cycle Register */ + smc.write_cycle = smc.read_cycle = cycle; + /* SMC Mode Register*/ + smc.tdf_cycles = tdf_cycles; + smc.mode = info->mode; + + sam9_smc_configure(0, info->cs, &smc); } static void pata_at91_set_piomode(struct ata_port *ap, struct ata_device *adev) @@ -288,20 +282,20 @@ static unsigned int pata_at91_data_xfer_noirq(struct ata_device *dev, struct at91_ide_info *info = dev->link->ap->host->private_data; unsigned int consumed; unsigned long flags; - unsigned int mode; + struct sam9_smc_config smc; local_irq_save(flags); - mode = at91_sys_read(AT91_SMC_MODE(info->cs)); + sam9_smc_read_mode(0, info->cs, &smc); /* set 16bit mode before writing data */ - at91_sys_write(AT91_SMC_MODE(info->cs), - (mode & ~AT91_SMC_DBW) | AT91_SMC_DBW_16); + smc.mode = (smc.mode & ~AT91_SMC_DBW) | AT91_SMC_DBW_16; + sam9_smc_write_mode(0, info->cs, &smc); consumed = ata_sff_data_xfer(dev, buf, buflen, rw); /* restore 8bit mode after data is written */ - at91_sys_write(AT91_SMC_MODE(info->cs), - (mode & ~AT91_SMC_DBW) | AT91_SMC_DBW_8); + smc.mode = (smc.mode & ~AT91_SMC_DBW) | AT91_SMC_DBW_8; + sam9_smc_write_mode(0, info->cs, &smc); local_irq_restore(flags); return consumed; diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 6381604696d3..0ab4a9548745 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -755,7 +755,7 @@ MODULE_DEVICE_TABLE(of, tegra_i2c_of_match); static struct platform_driver tegra_i2c_driver = { .probe = tegra_i2c_probe, - .remove = tegra_i2c_remove, + .remove = __devexit_p(tegra_i2c_remove), #ifdef CONFIG_PM .suspend = tegra_i2c_suspend, .resume = tegra_i2c_resume, diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile index 7f879b2397b0..af8d016c37ea 100644 --- a/drivers/ide/Makefile +++ b/drivers/ide/Makefile @@ -116,4 +116,3 @@ obj-$(CONFIG_BLK_DEV_IDE_AU1XXX) += au1xxx-ide.o obj-$(CONFIG_BLK_DEV_IDE_TX4938) += tx4938ide.o obj-$(CONFIG_BLK_DEV_IDE_TX4939) += tx4939ide.o -obj-$(CONFIG_BLK_DEV_IDE_AT91) += at91_ide.o diff --git a/drivers/ide/at91_ide.c b/drivers/ide/at91_ide.c deleted file mode 100644 index 41d415529479..000000000000 --- a/drivers/ide/at91_ide.c +++ /dev/null @@ -1,366 +0,0 @@ -/* - * IDE host driver for AT91 (SAM9, CAP9, AT572D940HF) Static Memory Controller - * with Compact Flash True IDE logic - * - * Copyright (c) 2008, 2009 Kelvatek Ltd. - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/ide.h> -#include <linux/platform_device.h> - -#include <mach/board.h> -#include <asm/gpio.h> -#include <mach/at91sam9_smc.h> - -#define DRV_NAME "at91_ide" - -#define perr(fmt, args...) pr_err(DRV_NAME ": " fmt, ##args) -#define pdbg(fmt, args...) pr_debug("%s " fmt, __func__, ##args) - -/* - * Access to IDE device is possible through EBI Static Memory Controller - * with Compact Flash logic. For details see EBI and SMC datasheet sections - * of any microcontroller from AT91SAM9 family. - * - * Within SMC chip select address space, lines A[23:21] distinguish Compact - * Flash modes (I/O, common memory, attribute memory, True IDE). IDE modes are: - * 0x00c0000 - True IDE - * 0x00e0000 - Alternate True IDE (Alt Status Register) - * - * On True IDE mode Task File and Data Register are mapped at the same address. - * To distinguish access between these two different bus data width is used: - * 8Bit for Task File, 16Bit for Data I/O. - * - * After initialization we do 8/16 bit flipping (changes in SMC MODE register) - * only inside IDE callback routines which are serialized by IDE layer, - * so no additional locking needed. - */ - -#define TASK_FILE 0x00c00000 -#define ALT_MODE 0x00e00000 -#define REGS_SIZE 8 - -#define enter_16bit(cs, mode) do { \ - mode = at91_sys_read(AT91_SMC_MODE(cs)); \ - at91_sys_write(AT91_SMC_MODE(cs), mode | AT91_SMC_DBW_16); \ -} while (0) - -#define leave_16bit(cs, mode) at91_sys_write(AT91_SMC_MODE(cs), mode); - -static void set_smc_timings(const u8 chipselect, const u16 cycle, - const u16 setup, const u16 pulse, - const u16 data_float, int use_iordy) -{ - unsigned long mode = AT91_SMC_READMODE | AT91_SMC_WRITEMODE | - AT91_SMC_BAT_SELECT; - - /* disable or enable waiting for IORDY signal */ - if (use_iordy) - mode |= AT91_SMC_EXNWMODE_READY; - - /* add data float cycles if needed */ - if (data_float) - mode |= AT91_SMC_TDF_(data_float); - - at91_sys_write(AT91_SMC_MODE(chipselect), mode); - - /* setup timings in SMC */ - at91_sys_write(AT91_SMC_SETUP(chipselect), AT91_SMC_NWESETUP_(setup) | - AT91_SMC_NCS_WRSETUP_(0) | - AT91_SMC_NRDSETUP_(setup) | - AT91_SMC_NCS_RDSETUP_(0)); - at91_sys_write(AT91_SMC_PULSE(chipselect), AT91_SMC_NWEPULSE_(pulse) | - AT91_SMC_NCS_WRPULSE_(cycle) | - AT91_SMC_NRDPULSE_(pulse) | - AT91_SMC_NCS_RDPULSE_(cycle)); - at91_sys_write(AT91_SMC_CYCLE(chipselect), AT91_SMC_NWECYCLE_(cycle) | - AT91_SMC_NRDCYCLE_(cycle)); -} - -static unsigned int calc_mck_cycles(unsigned int ns, unsigned int mck_hz) -{ - u64 tmp = ns; - - tmp *= mck_hz; - tmp += 1000*1000*1000 - 1; /* round up */ - do_div(tmp, 1000*1000*1000); - return (unsigned int) tmp; -} - -static void apply_timings(const u8 chipselect, const u8 pio, - const struct ide_timing *timing, int use_iordy) -{ - unsigned int t0, t1, t2, t6z; - unsigned int cycle, setup, pulse, data_float; - unsigned int mck_hz; - struct clk *mck; - - /* see table 22 of Compact Flash standard 4.1 for the meaning, - * we do not stretch active (t2) time, so setup (t1) + hold time (th) - * assure at least minimal recovery (t2i) time */ - t0 = timing->cyc8b; - t1 = timing->setup; - t2 = timing->act8b; - t6z = (pio < 5) ? 30 : 20; - - pdbg("t0=%u t1=%u t2=%u t6z=%u\n", t0, t1, t2, t6z); - - mck = clk_get(NULL, "mck"); - BUG_ON(IS_ERR(mck)); - mck_hz = clk_get_rate(mck); - pdbg("mck_hz=%u\n", mck_hz); - - cycle = calc_mck_cycles(t0, mck_hz); - setup = calc_mck_cycles(t1, mck_hz); - pulse = calc_mck_cycles(t2, mck_hz); - data_float = calc_mck_cycles(t6z, mck_hz); - - pdbg("cycle=%u setup=%u pulse=%u data_float=%u\n", - cycle, setup, pulse, data_float); - - set_smc_timings(chipselect, cycle, setup, pulse, data_float, use_iordy); -} - -static void at91_ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, - void *buf, unsigned int len) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - u8 chipselect = hwif->select_data; - unsigned long mode; - - pdbg("cs %u buf %p len %d\n", chipselect, buf, len); - - len++; - - enter_16bit(chipselect, mode); - readsw((void __iomem *)io_ports->data_addr, buf, len / 2); - leave_16bit(chipselect, mode); -} - -static void at91_ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, - void *buf, unsigned int len) -{ - ide_hwif_t *hwif = drive->hwif; - struct ide_io_ports *io_ports = &hwif->io_ports; - u8 chipselect = hwif->select_data; - unsigned long mode; - - pdbg("cs %u buf %p len %d\n", chipselect, buf, len); - - enter_16bit(chipselect, mode); - writesw((void __iomem *)io_ports->data_addr, buf, len / 2); - leave_16bit(chipselect, mode); -} - -static void at91_ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) -{ - struct ide_timing *timing; - u8 chipselect = hwif->select_data; - int use_iordy = 0; - const u8 pio = drive->pio_mode - XFER_PIO_0; - - pdbg("chipselect %u pio %u\n", chipselect, pio); - - timing = ide_timing_find_mode(XFER_PIO_0 + pio); - BUG_ON(!timing); - - if (ide_pio_need_iordy(drive, pio)) - use_iordy = 1; - - apply_timings(chipselect, pio, timing, use_iordy); -} - -static const struct ide_tp_ops at91_ide_tp_ops = { - .exec_command = ide_exec_command, - .read_status = ide_read_status, - .read_altstatus = ide_read_altstatus, - .write_devctl = ide_write_devctl, - - .dev_select = ide_dev_select, - .tf_load = ide_tf_load, - .tf_read = ide_tf_read, - - .input_data = at91_ide_input_data, - .output_data = at91_ide_output_data, -}; - -static const struct ide_port_ops at91_ide_port_ops = { - .set_pio_mode = at91_ide_set_pio_mode, -}; - -static const struct ide_port_info at91_ide_port_info __initdata = { - .port_ops = &at91_ide_port_ops, - .tp_ops = &at91_ide_tp_ops, - .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA | IDE_HFLAG_SINGLE | - IDE_HFLAG_NO_IO_32BIT | IDE_HFLAG_UNMASK_IRQS, - .pio_mask = ATA_PIO6, - .chipset = ide_generic, -}; - -/* - * If interrupt is delivered through GPIO, IRQ are triggered on falling - * and rising edge of signal. Whereas IDE device request interrupt on high - * level (rising edge in our case). This mean we have fake interrupts, so - * we need to check interrupt pin and exit instantly from ISR when line - * is on low level. - */ - -irqreturn_t at91_irq_handler(int irq, void *dev_id) -{ - int ntries = 8; - int pin_val1, pin_val2; - - /* additional deglitch, line can be noisy in badly designed PCB */ - do { - pin_val1 = at91_get_gpio_value(irq); - pin_val2 = at91_get_gpio_value(irq); - } while (pin_val1 != pin_val2 && --ntries > 0); - - if (pin_val1 == 0 || ntries <= 0) - return IRQ_HANDLED; - - return ide_intr(irq, dev_id); -} - -static int __init at91_ide_probe(struct platform_device *pdev) -{ - int ret; - struct ide_hw hw, *hws[] = { &hw }; - struct ide_host *host; - struct resource *res; - unsigned long tf_base = 0, ctl_base = 0; - struct at91_cf_data *board = pdev->dev.platform_data; - - if (!board) - return -ENODEV; - - if (board->det_pin && at91_get_gpio_value(board->det_pin) != 0) { - perr("no device detected\n"); - return -ENODEV; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - perr("can't get memory resource\n"); - return -ENODEV; - } - - if (!devm_request_mem_region(&pdev->dev, res->start + TASK_FILE, - REGS_SIZE, "ide") || - !devm_request_mem_region(&pdev->dev, res->start + ALT_MODE, - REGS_SIZE, "alt")) { - perr("memory resources in use\n"); - return -EBUSY; - } - - pdbg("chipselect %u irq %u res %08lx\n", board->chipselect, - board->irq_pin, (unsigned long) res->start); - - tf_base = (unsigned long) devm_ioremap(&pdev->dev, res->start + TASK_FILE, - REGS_SIZE); - ctl_base = (unsigned long) devm_ioremap(&pdev->dev, res->start + ALT_MODE, - REGS_SIZE); - if (!tf_base || !ctl_base) { - perr("can't map memory regions\n"); - return -EBUSY; - } - - memset(&hw, 0, sizeof(hw)); - - if (board->flags & AT91_IDE_SWAP_A0_A2) { - /* workaround for stupid hardware bug */ - hw.io_ports.data_addr = tf_base + 0; - hw.io_ports.error_addr = tf_base + 4; - hw.io_ports.nsect_addr = tf_base + 2; - hw.io_ports.lbal_addr = tf_base + 6; - hw.io_ports.lbam_addr = tf_base + 1; - hw.io_ports.lbah_addr = tf_base + 5; - hw.io_ports.device_addr = tf_base + 3; - hw.io_ports.command_addr = tf_base + 7; - hw.io_ports.ctl_addr = ctl_base + 3; - } else - ide_std_init_ports(&hw, tf_base, ctl_base + 6); - - hw.irq = board->irq_pin; - hw.dev = &pdev->dev; - - host = ide_host_alloc(&at91_ide_port_info, hws, 1); - if (!host) { - perr("failed to allocate ide host\n"); - return -ENOMEM; - } - - /* setup Static Memory Controller - PIO 0 as default */ - apply_timings(board->chipselect, 0, ide_timing_find_mode(XFER_PIO_0), 0); - - /* with GPIO interrupt we have to do quirks in handler */ - if (gpio_is_valid(board->irq_pin)) - host->irq_handler = at91_irq_handler; - - host->ports[0]->select_data = board->chipselect; - - ret = ide_host_register(host, &at91_ide_port_info, hws); - if (ret) { - perr("failed to register ide host\n"); - goto err_free_host; - } - platform_set_drvdata(pdev, host); - return 0; - -err_free_host: - ide_host_free(host); - return ret; -} - -static int __exit at91_ide_remove(struct platform_device *pdev) -{ - struct ide_host *host = platform_get_drvdata(pdev); - - ide_host_remove(host); - return 0; -} - -static struct platform_driver at91_ide_driver = { - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, - .remove = __exit_p(at91_ide_remove), -}; - -static int __init at91_ide_init(void) -{ - return platform_driver_probe(&at91_ide_driver, at91_ide_probe); -} - -static void __exit at91_ide_exit(void) -{ - platform_driver_unregister(&at91_ide_driver); -} - -module_init(at91_ide_init); -module_exit(at91_ide_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Stanislaw Gruszka <stf_xl@wp.pl>"); - diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c index a3ad957507dc..ee3c122c0599 100644 --- a/drivers/rtc/rtc-at91sam9.c +++ b/drivers/rtc/rtc-at91sam9.c @@ -307,8 +307,12 @@ static int __init at91_rtc_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 1); platform_set_drvdata(pdev, rtc); - rtc->rtt = (void __force __iomem *) (AT91_VA_BASE_SYS - AT91_BASE_SYS); - rtc->rtt += r->start; + rtc->rtt = ioremap(r->start, resource_size(r)); + if (!rtc->rtt) { + dev_err(&pdev->dev, "failed to map registers, aborting.\n"); + ret = -ENOMEM; + goto fail; + } mr = rtt_readl(rtc, MR); @@ -326,7 +330,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev) &at91_rtc_ops, THIS_MODULE); if (IS_ERR(rtc->rtcdev)) { ret = PTR_ERR(rtc->rtcdev); - goto fail; + goto fail_register; } /* register irq handler after we know what name we'll use */ @@ -351,6 +355,8 @@ static int __init at91_rtc_probe(struct platform_device *pdev) return 0; +fail_register: + iounmap(rtc->rtt); fail: platform_set_drvdata(pdev, NULL); kfree(rtc); @@ -371,6 +377,7 @@ static int __exit at91_rtc_remove(struct platform_device *pdev) rtc_device_unregister(rtc->rtcdev); + iounmap(rtc->rtt); platform_set_drvdata(pdev, NULL); kfree(rtc); return 0; |
