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-rw-r--r--arch/arm/mach-omap2/Makefile3
-rw-r--r--arch/arm/mach-omap2/gpmc-nand.c154
-rw-r--r--include/linux/omap-gpmc.h11
3 files changed, 0 insertions, 168 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 093458b62c8d..c89757abb0ae 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -241,6 +241,3 @@ obj-$(CONFIG_MACH_OMAP2_TUSB6010) += usb-tusb6010.o
241 241
242onenand-$(CONFIG_MTD_ONENAND_OMAP2) := gpmc-onenand.o 242onenand-$(CONFIG_MTD_ONENAND_OMAP2) := gpmc-onenand.o
243obj-y += $(onenand-m) $(onenand-y) 243obj-y += $(onenand-m) $(onenand-y)
244
245nand-$(CONFIG_MTD_NAND_OMAP2) := gpmc-nand.o
246obj-y += $(nand-m) $(nand-y)
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}
diff --git a/include/linux/omap-gpmc.h b/include/linux/omap-gpmc.h
index e821a3132a3e..fd0de00c0d77 100644
--- a/include/linux/omap-gpmc.h
+++ b/include/linux/omap-gpmc.h
@@ -76,17 +76,6 @@ struct gpmc_timings;
76struct omap_nand_platform_data; 76struct omap_nand_platform_data;
77struct omap_onenand_platform_data; 77struct omap_onenand_platform_data;
78 78
79#if IS_ENABLED(CONFIG_MTD_NAND_OMAP2)
80extern int gpmc_nand_init(struct omap_nand_platform_data *d,
81 struct gpmc_timings *gpmc_t);
82#else
83static inline int gpmc_nand_init(struct omap_nand_platform_data *d,
84 struct gpmc_timings *gpmc_t)
85{
86 return 0;
87}
88#endif
89
90#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2) 79#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
91extern int gpmc_onenand_init(struct omap_onenand_platform_data *d); 80extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
92#else 81#else
generated by cgit v1.2.2 (git 2.25.0) at 2025-05-28 16:24:41 -0400