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authorTakashi Iwai <tiwai@suse.de>2017-05-02 02:25:25 -0400
committerTakashi Iwai <tiwai@suse.de>2017-05-02 02:25:25 -0400
commita5c3b32a1146e44f6b38fdfdfffc27842953420c (patch)
treeeca93f51c8deabe77ed079a3e9190717b6380009 /arch/arm/mach-omap2/gpmc-nand.c
parentd7dc450d5a7162de96edbed6b1792240c2f3a55f (diff)
parent20d5c84bef067b7e804a163e2abca16c47125bad (diff)
Merge tag 'asoc-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v4.12 A quiet release for the core, but lots of new drivers this time around: - A new, generalized, API for hooking up jacks which makes it easier to write generic machine drivers for simple cases. - Continuing fixes for issues with the x86 CPU drivers. - New drivers for Cirrus CS35L35, DIO DIO2125, Everest ES7132, HiSilicon hi6210, Maxim MAX98927, MT2701 systems with WM8960, Nuvoton NAU8824, Odroid systems, ST STM32 SAI controllers and x86 systems with DA7213
Diffstat (limited to 'arch/arm/mach-omap2/gpmc-nand.c')
-rw-r--r--arch/arm/mach-omap2/gpmc-nand.c154
1 files changed, 0 insertions, 154 deletions
diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
deleted file mode 100644
index f6ac027f3c3b..000000000000
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ /dev/null
@@ -1,154 +0,0 @@
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>
15#include <linux/omap-gpmc.h>
16#include <linux/mtd/nand.h>
17#include <linux/platform_data/mtd-nand-omap2.h>
18
19#include <asm/mach/flash.h>
20
21#include "soc.h"
22
23/* minimum size for IO mapping */
24#define NAND_IO_SIZE 4
25
26static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
27{
28 /* platforms which support all ECC schemes */
29 if (soc_is_am33xx() || soc_is_am43xx() || cpu_is_omap44xx() ||
30 soc_is_omap54xx() || soc_is_dra7xx())
31 return 1;
32
33 if (ecc_opt == OMAP_ECC_BCH4_CODE_HW_DETECTION_SW ||
34 ecc_opt == OMAP_ECC_BCH8_CODE_HW_DETECTION_SW) {
35 if (cpu_is_omap24xx())
36 return 0;
37 else if (cpu_is_omap3630() && (GET_OMAP_REVISION() == 0))
38 return 0;
39 else
40 return 1;
41 }
42
43 /* OMAP3xxx do not have ELM engine, so cannot support ECC schemes
44 * which require H/W based ECC error detection */
45 if ((cpu_is_omap34xx() || cpu_is_omap3630()) &&
46 ((ecc_opt == OMAP_ECC_BCH4_CODE_HW) ||
47 (ecc_opt == OMAP_ECC_BCH8_CODE_HW)))
48 return 0;
49
50 /* legacy platforms support only HAM1 (1-bit Hamming) ECC scheme */
51 if (ecc_opt == OMAP_ECC_HAM1_CODE_HW ||
52 ecc_opt == OMAP_ECC_HAM1_CODE_SW)
53 return 1;
54 else
55 return 0;
56}
57
58/* This function will go away once the device-tree convertion is complete */
59static void gpmc_set_legacy(struct omap_nand_platform_data *gpmc_nand_data,
60 struct gpmc_settings *s)
61{
62 /* Enable RD PIN Monitoring Reg */
63 if (gpmc_nand_data->dev_ready) {
64 s->wait_on_read = true;
65 s->wait_on_write = true;
66 }
67
68 if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
69 s->device_width = GPMC_DEVWIDTH_16BIT;
70 else
71 s->device_width = GPMC_DEVWIDTH_8BIT;
72}
73
74int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
75 struct gpmc_timings *gpmc_t)
76{
77 int err = 0;
78 struct gpmc_settings s;
79 struct platform_device *pdev;
80 struct resource gpmc_nand_res[] = {
81 { .flags = IORESOURCE_MEM, },
82 { .flags = IORESOURCE_IRQ, },
83 { .flags = IORESOURCE_IRQ, },
84 };
85
86 BUG_ON(gpmc_nand_data->cs >= GPMC_CS_NUM);
87
88 err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
89 (unsigned long *)&gpmc_nand_res[0].start);
90 if (err < 0) {
91 pr_err("omap2-gpmc: Cannot request GPMC CS %d, error %d\n",
92 gpmc_nand_data->cs, err);
93 return err;
94 }
95 gpmc_nand_res[0].end = gpmc_nand_res[0].start + NAND_IO_SIZE - 1;
96 gpmc_nand_res[1].start = gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
97 gpmc_nand_res[2].start = gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
98
99 memset(&s, 0, sizeof(struct gpmc_settings));
100 gpmc_set_legacy(gpmc_nand_data, &s);
101
102 s.device_nand = true;
103
104 if (gpmc_t) {
105 err = gpmc_cs_set_timings(gpmc_nand_data->cs, gpmc_t, &s);
106 if (err < 0) {
107 pr_err("omap2-gpmc: Unable to set gpmc timings: %d\n",
108 err);
109 return err;
110 }
111 }
112
113 err = gpmc_cs_program_settings(gpmc_nand_data->cs, &s);
114 if (err < 0)
115 goto out_free_cs;
116
117 err = gpmc_configure(GPMC_CONFIG_WP, 0);
118 if (err < 0)
119 goto out_free_cs;
120
121 if (!gpmc_hwecc_bch_capable(gpmc_nand_data->ecc_opt)) {
122 pr_err("omap2-nand: Unsupported NAND ECC scheme selected\n");
123 err = -EINVAL;
124 goto out_free_cs;
125 }
126
127
128 pdev = platform_device_alloc("omap2-nand", gpmc_nand_data->cs);
129 if (pdev) {
130 err = platform_device_add_resources(pdev, gpmc_nand_res,
131 ARRAY_SIZE(gpmc_nand_res));
132 if (!err)
133 pdev->dev.platform_data = gpmc_nand_data;
134 } else {
135 err = -ENOMEM;
136 }
137 if (err)
138 goto out_free_pdev;
139
140 err = platform_device_add(pdev);
141 if (err) {
142 dev_err(&pdev->dev, "Unable to register NAND device\n");
143 goto out_free_pdev;
144 }
145
146 return 0;
147
148out_free_pdev:
149 platform_device_put(pdev);
150out_free_cs:
151 gpmc_cs_free(gpmc_nand_data->cs);
152
153 return err;
154}