Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 1 | /* |
| 2 | * gpmc-nand.c |
| 3 | * |
| 4 | * Copyright (C) 2009 Texas Instruments |
| 5 | * Vimal Singh <vimalsingh@ti.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/io.h> |
Sukumar Ghorai | d5ce2b6 | 2011-01-28 15:42:03 +0530 | [diff] [blame] | 15 | #include <linux/mtd/nand.h> |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 16 | |
| 17 | #include <asm/mach/flash.h> |
| 18 | |
Tony Lindgren | 2c799ce | 2012-02-24 10:34:35 -0800 | [diff] [blame] | 19 | #include <plat/cpu.h> |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 20 | #include <plat/nand.h> |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 21 | #include <plat/gpmc.h> |
| 22 | |
Afzal Mohammed | 2ee30f0 | 2012-08-30 12:53:24 -0700 | [diff] [blame] | 23 | static struct resource gpmc_nand_resource[] = { |
| 24 | { |
| 25 | .flags = IORESOURCE_MEM, |
| 26 | }, |
| 27 | { |
| 28 | .flags = IORESOURCE_IRQ, |
| 29 | }, |
| 30 | { |
| 31 | .flags = IORESOURCE_IRQ, |
| 32 | }, |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 33 | }; |
| 34 | |
| 35 | static struct platform_device gpmc_nand_device = { |
| 36 | .name = "omap2-nand", |
| 37 | .id = 0, |
Afzal Mohammed | 2ee30f0 | 2012-08-30 12:53:24 -0700 | [diff] [blame] | 38 | .num_resources = ARRAY_SIZE(gpmc_nand_resource), |
| 39 | .resource = gpmc_nand_resource, |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 40 | }; |
| 41 | |
Grazvydas Ignotas | 7a559c7 | 2011-06-03 19:56:33 +0000 | [diff] [blame] | 42 | static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data) |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 43 | { |
| 44 | struct gpmc_timings t; |
| 45 | int err; |
| 46 | |
stanley.miao | 11e1ef2 | 2010-04-20 06:33:30 +0000 | [diff] [blame] | 47 | if (!gpmc_nand_data->gpmc_t) |
| 48 | return 0; |
| 49 | |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 50 | memset(&t, 0, sizeof(t)); |
Adrian Hunter | a3551f5 | 2010-12-09 10:48:27 +0200 | [diff] [blame] | 51 | t.sync_clk = gpmc_nand_data->gpmc_t->sync_clk; |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 52 | t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on); |
| 53 | t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on); |
| 54 | |
| 55 | /* Read */ |
| 56 | t.adv_rd_off = gpmc_round_ns_to_ticks( |
| 57 | gpmc_nand_data->gpmc_t->adv_rd_off); |
| 58 | t.oe_on = t.adv_on; |
| 59 | t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access); |
| 60 | t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off); |
| 61 | t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off); |
| 62 | t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle); |
| 63 | |
| 64 | /* Write */ |
| 65 | t.adv_wr_off = gpmc_round_ns_to_ticks( |
| 66 | gpmc_nand_data->gpmc_t->adv_wr_off); |
| 67 | t.we_on = t.oe_on; |
| 68 | if (cpu_is_omap34xx()) { |
| 69 | t.wr_data_mux_bus = gpmc_round_ns_to_ticks( |
| 70 | gpmc_nand_data->gpmc_t->wr_data_mux_bus); |
| 71 | t.wr_access = gpmc_round_ns_to_ticks( |
| 72 | gpmc_nand_data->gpmc_t->wr_access); |
| 73 | } |
| 74 | t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off); |
| 75 | t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off); |
| 76 | t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle); |
| 77 | |
| 78 | /* Configure GPMC */ |
Sukumar Ghorai | d5ce2b6 | 2011-01-28 15:42:03 +0530 | [diff] [blame] | 79 | if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16) |
| 80 | gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 1); |
| 81 | else |
| 82 | gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_DEV_SIZE, 0); |
Sukumar Ghorai | 2c01946c | 2010-07-09 09:14:45 +0000 | [diff] [blame] | 83 | gpmc_cs_configure(gpmc_nand_data->cs, |
| 84 | GPMC_CONFIG_DEV_TYPE, GPMC_DEVICETYPE_NAND); |
Afzal Mohammed | 2ee30f0 | 2012-08-30 12:53:24 -0700 | [diff] [blame] | 85 | gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_WP, 0); |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 86 | err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t); |
| 87 | if (err) |
| 88 | return err; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
Grazvydas Ignotas | 7a559c7 | 2011-06-03 19:56:33 +0000 | [diff] [blame] | 93 | int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data) |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 94 | { |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 95 | int err = 0; |
| 96 | struct device *dev = &gpmc_nand_device.dev; |
| 97 | |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 98 | gpmc_nand_device.dev.platform_data = gpmc_nand_data; |
| 99 | |
| 100 | err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE, |
Afzal Mohammed | 2ee30f0 | 2012-08-30 12:53:24 -0700 | [diff] [blame] | 101 | (unsigned long *)&gpmc_nand_resource[0].start); |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 102 | if (err < 0) { |
| 103 | dev_err(dev, "Cannot request GPMC CS\n"); |
| 104 | return err; |
| 105 | } |
| 106 | |
Afzal Mohammed | 2ee30f0 | 2012-08-30 12:53:24 -0700 | [diff] [blame] | 107 | gpmc_nand_resource[0].end = gpmc_nand_resource[0].start + |
| 108 | NAND_IO_SIZE - 1; |
Afzal Mohammed | 9222e3a | 2012-08-30 12:53:23 -0700 | [diff] [blame] | 109 | |
Afzal Mohammed | 2ee30f0 | 2012-08-30 12:53:24 -0700 | [diff] [blame] | 110 | gpmc_nand_resource[1].start = |
| 111 | gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE); |
| 112 | gpmc_nand_resource[2].start = |
| 113 | gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT); |
Sukumar Ghorai | 2c01946c | 2010-07-09 09:14:45 +0000 | [diff] [blame] | 114 | /* Set timings in GPMC */ |
Grazvydas Ignotas | 7a559c7 | 2011-06-03 19:56:33 +0000 | [diff] [blame] | 115 | err = omap2_nand_gpmc_retime(gpmc_nand_data); |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 116 | if (err < 0) { |
Sukumar Ghorai | 2c01946c | 2010-07-09 09:14:45 +0000 | [diff] [blame] | 117 | dev_err(dev, "Unable to set gpmc timings: %d\n", err); |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 118 | return err; |
| 119 | } |
| 120 | |
| 121 | /* Enable RD PIN Monitoring Reg */ |
| 122 | if (gpmc_nand_data->dev_ready) { |
Sukumar Ghorai | 2c01946c | 2010-07-09 09:14:45 +0000 | [diff] [blame] | 123 | gpmc_cs_configure(gpmc_nand_data->cs, GPMC_CONFIG_RDY_BSY, 1); |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 124 | } |
| 125 | |
Afzal Mohammed | d126d01 | 2012-08-30 12:53:22 -0700 | [diff] [blame] | 126 | gpmc_update_nand_reg(&gpmc_nand_data->reg, gpmc_nand_data->cs); |
| 127 | |
Vimal Singh | 2f70a1e | 2010-02-15 10:03:33 -0800 | [diff] [blame] | 128 | err = platform_device_register(&gpmc_nand_device); |
| 129 | if (err < 0) { |
| 130 | dev_err(dev, "Unable to register NAND device\n"); |
| 131 | goto out_free_cs; |
| 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | |
| 136 | out_free_cs: |
| 137 | gpmc_cs_free(gpmc_nand_data->cs); |
| 138 | |
| 139 | return err; |
| 140 | } |