ARM: OMAP2+: nand: header cleanup

For common arm zImage existing nand header file
in platform specific location was moved to generic
platform data location, but it contained more than
platform data, remove it. New local header has been
created for exposing functions.

Also move gpmc-nand platform data to platform header
meant for nand from gpmc header file

Signed-off-by: Afzal Mohammed <afzal@ti.com>

9 files changed, 69 insertions, 60 deletions

diff --git a/arch/arm/mach-omap2/board-cm-t35.c b/arch/arm/mach-omap2/board-cm-t35.c
index 376d26eb601c..fef68de716b5 100644
--- a/arch/arm/mach-omap2/board-cm-t35.c
+++ b/arch/arm/mach-omap2/board-cm-t35.c
@@ -53,6 +53,7 @@
 #include "sdram-micron-mt46h32m32lf-6.h"
 #include "hsmmc.h"
 #include "common-board-devices.h"
+#include "gpmc-nand.h"
 
 #define CM_T35_GPIO_PENDOWN             57
 #define SB_T35_USB_HUB_RESET_GPIO       167
@@ -181,7 +182,7 @@ static struct omap_nand_platform_data cm_t35_nand_data = {
 
 static void __init cm_t35_init_nand(void)
 {
-        if (gpmc_nand_init(&cm_t35_nand_data) < 0)
+        if (gpmc_nand_init(&cm_t35_nand_data, NULL) < 0)
                 pr_err("CM-T35: Unable to register NAND device\n");
 }
 #else
diff --git a/arch/arm/mach-omap2/board-cm-t3517.c b/arch/arm/mach-omap2/board-cm-t3517.c
index 59c0a45f75b0..3a19e80e0005 100644
--- a/arch/arm/mach-omap2/board-cm-t3517.c
+++ b/arch/arm/mach-omap2/board-cm-t3517.c
@@ -49,6 +49,7 @@
 #include "control.h"
 #include "common-board-devices.h"
 #include "am35xx-emac.h"
+#include "gpmc-nand.h"
 
 #if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
 static struct gpio_led cm_t3517_leds[] = {
@@ -240,7 +241,7 @@ static struct omap_nand_platform_data cm_t3517_nand_data = {
 
 static void __init cm_t3517_init_nand(void)
 {
-        if (gpmc_nand_init(&cm_t3517_nand_data) < 0)
+        if (gpmc_nand_init(&cm_t3517_nand_data, NULL) < 0)
                 pr_err("CM-T3517: NAND initialization failed\n");
 }
 #else
diff --git a/arch/arm/mach-omap2/board-flash.c b/arch/arm/mach-omap2/board-flash.c
index f438d511ba11..ba9fa86a10aa 100644
--- a/arch/arm/mach-omap2/board-flash.c
+++ b/arch/arm/mach-omap2/board-flash.c
@@ -26,6 +26,7 @@
 #include "common.h"
 #include "board-flash.h"
 #include "gpmc-onenand.h"
+#include "gpmc-nand.h"
 
 #define REG_FPGA_REV                    0x10
 #define REG_FPGA_DIP_SWITCH_INPUT2      0x60
@@ -139,10 +140,9 @@ __init board_nand_init(struct mtd_partition *nand_parts, u8 nr_parts, u8 cs,
         board_nand_data.parts           = nand_parts;
         board_nand_data.nr_parts        = nr_parts;
         board_nand_data.devsize         = nand_type;
-        board_nand_data.gpmc_t          = gpmc_t;
 
         board_nand_data.ecc_opt = OMAP_ECC_HAMMING_CODE_DEFAULT;
-        gpmc_nand_init(&board_nand_data);
+        gpmc_nand_init(&board_nand_data, gpmc_t);
 }
 #endif /* CONFIG_MTD_NAND_OMAP2 || CONFIG_MTD_NAND_OMAP2_MODULE */
 
diff --git a/arch/arm/mach-omap2/board-omap3pandora.c b/arch/arm/mach-omap2/board-omap3pandora.c
index 00a1f4ae6e44..f286b4b4bd5b 100644
--- a/arch/arm/mach-omap2/board-omap3pandora.c
+++ b/arch/arm/mach-omap2/board-omap3pandora.c
@@ -50,6 +50,7 @@
 #include "sdram-micron-mt46h32m32lf-6.h"
 #include "hsmmc.h"
 #include "common-board-devices.h"
+#include "gpmc-nand.h"
 
 #define PANDORA_WIFI_IRQ_GPIO           21
 #define PANDORA_WIFI_NRESET_GPIO        23
@@ -602,7 +603,7 @@ static void __init omap3pandora_init(void)
         omap_ads7846_init(1, OMAP3_PANDORA_TS_GPIO, 0, NULL);
         usbhs_init(&usbhs_bdata);
         usb_musb_init(NULL);
-        gpmc_nand_init(&pandora_nand_data);
+        gpmc_nand_init(&pandora_nand_data, NULL);
 
         /* Ensure SDRC pins are mux'd for self-refresh */
         omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
diff --git a/arch/arm/mach-omap2/common-board-devices.c b/arch/arm/mach-omap2/common-board-devices.c
index 90e0597667b9..ad856092c06a 100644
--- a/arch/arm/mach-omap2/common-board-devices.c
+++ b/arch/arm/mach-omap2/common-board-devices.c
@@ -25,7 +25,6 @@
 #include <linux/spi/ads7846.h>
 
 #include <linux/platform_data/spi-omap2-mcspi.h>
-#include <linux/platform_data/mtd-nand-omap2.h>
 
 #include "common.h"
 #include "common-board-devices.h"
diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
index 4acf497faeb3..abdb78a95a94 100644
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ b/arch/arm/mach-omap2/gpmc-nand.c
@@ -20,6 +20,10 @@
 #include <plat/gpmc.h>
 
 #include "soc.h"
+#include "gpmc-nand.h"
+
+/* minimum size for IO mapping */
+#define NAND_IO_SIZE    4
 
 static struct resource gpmc_nand_resource[] = {
         {
@@ -40,41 +44,36 @@ static struct platform_device gpmc_nand_device = {
         .resource       = gpmc_nand_resource,
 };
 
-static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data)
+static int omap2_nand_gpmc_retime(
+                                struct omap_nand_platform_data *gpmc_nand_data,
+                                struct gpmc_timings *gpmc_t)
 {
         struct gpmc_timings t;
         int err;
 
-        if (!gpmc_nand_data->gpmc_t)
-                return 0;
-
         memset(&t, 0, sizeof(t));
-        t.sync_clk = gpmc_nand_data->gpmc_t->sync_clk;
-        t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on);
-        t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on);
+        t.sync_clk = gpmc_t->sync_clk;
+        t.cs_on = gpmc_round_ns_to_ticks(gpmc_t->cs_on);
+        t.adv_on = gpmc_round_ns_to_ticks(gpmc_t->adv_on);
 
         /* Read */
-        t.adv_rd_off = gpmc_round_ns_to_ticks(
-                                gpmc_nand_data->gpmc_t->adv_rd_off);
+        t.adv_rd_off = gpmc_round_ns_to_ticks(gpmc_t->adv_rd_off);
         t.oe_on  = t.adv_on;
-        t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access);
-        t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off);
-        t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off);
-        t.rd_cycle  = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle);
+        t.access = gpmc_round_ns_to_ticks(gpmc_t->access);
+        t.oe_off = gpmc_round_ns_to_ticks(gpmc_t->oe_off);
+        t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_t->cs_rd_off);
+        t.rd_cycle  = gpmc_round_ns_to_ticks(gpmc_t->rd_cycle);
 
         /* Write */
-        t.adv_wr_off = gpmc_round_ns_to_ticks(
-                                gpmc_nand_data->gpmc_t->adv_wr_off);
+        t.adv_wr_off = gpmc_round_ns_to_ticks(gpmc_t->adv_wr_off);
         t.we_on  = t.oe_on;
         if (cpu_is_omap34xx()) {
-            t.wr_data_mux_bus = gpmc_round_ns_to_ticks(
-                                gpmc_nand_data->gpmc_t->wr_data_mux_bus);
-            t.wr_access = gpmc_round_ns_to_ticks(
-                                gpmc_nand_data->gpmc_t->wr_access);
+            t.wr_data_mux_bus = gpmc_round_ns_to_ticks(gpmc_t->wr_data_mux_bus);
+            t.wr_access = gpmc_round_ns_to_ticks(gpmc_t->wr_access);
         }
-        t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off);
-        t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off);
-        t.wr_cycle  = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
+        t.we_off = gpmc_round_ns_to_ticks(gpmc_t->we_off);
+        t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_t->cs_wr_off);
+        t.wr_cycle  = gpmc_round_ns_to_ticks(gpmc_t->wr_cycle);
 
         /* Configure GPMC */
         if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16)
@@ -91,7 +90,8 @@ static int omap2_nand_gpmc_retime(struct omap_nand_platform_data *gpmc_nand_data
         return 0;
 }
 
-int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
+int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
+                          struct gpmc_timings *gpmc_t)
 {
         int err = 0;
         struct device *dev = &gpmc_nand_device.dev;
@@ -112,11 +112,13 @@ int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data)
                                 gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
         gpmc_nand_resource[2].start =
                                 gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
-         /* Set timings in GPMC */
-        err = omap2_nand_gpmc_retime(gpmc_nand_data);
-        if (err < 0) {
-                dev_err(dev, "Unable to set gpmc timings: %d\n", err);
-                return err;
+
+        if (gpmc_t) {
+                err = omap2_nand_gpmc_retime(gpmc_nand_data, gpmc_t);
+                if (err < 0) {
+                        dev_err(dev, "Unable to set gpmc timings: %d\n", err);
+                        return err;
+                }
         }
 
         /* Enable RD PIN Monitoring Reg */
diff --git a/arch/arm/mach-omap2/gpmc-nand.h b/arch/arm/mach-omap2/gpmc-nand.h
new file mode 100644
index 000000000000..11a377f0e6f0
--- /dev/null
+++ b/arch/arm/mach-omap2/gpmc-nand.h
@@ -0,0 +1,27 @@
+/*
+ *  arch/arm/mach-omap2/gpmc-nand.h
+ *
+ *  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.
+ */
+
+#ifndef __OMAP2_GPMC_NAND_H
+#define __OMAP2_GPMC_NAND_H
+
+#include <plat/gpmc.h>
+#include <linux/platform_data/mtd-nand-omap2.h>
+
+#if IS_ENABLED(CONFIG_MTD_NAND_OMAP2)
+extern int gpmc_nand_init(struct omap_nand_platform_data *d,
+                          struct gpmc_timings *gpmc_t);
+#else
+static inline int gpmc_nand_init(struct omap_nand_platform_data *d,
+                                 struct gpmc_timings *gpmc_t)
+{
+        return 0;
+}
+#endif
+
+#endif
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 91af5aefeaae..34823b3092f3 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -26,6 +26,8 @@
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 
+#include <linux/platform_data/mtd-nand-omap2.h>
+
 #include <asm/mach-types.h>
 #include <plat/gpmc.h>
 
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
index f7e0990eaf37..4b06bb4531a2 100644
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -11,6 +11,8 @@
 #ifndef __OMAP2_GPMC_H
 #define __OMAP2_GPMC_H
 
+#include <linux/platform_data/mtd-nand-omap2.h>
+
 /* Maximum Number of Chip Selects */
 #define GPMC_CS_NUM             8
 
@@ -86,16 +88,6 @@
 #define PREFETCH_FIFOTHRESHOLD_MAX      0x40
 #define PREFETCH_FIFOTHRESHOLD(val)     ((val) << 8)
 
-enum omap_ecc {
-                /* 1-bit ecc: stored at end of spare area */
-        OMAP_ECC_HAMMING_CODE_DEFAULT = 0, /* Default, s/w method */
-        OMAP_ECC_HAMMING_CODE_HW, /* gpmc to detect the error */
-                /* 1-bit ecc: stored at beginning of spare area as romcode */
-        OMAP_ECC_HAMMING_CODE_HW_ROMCODE, /* gpmc method & romcode layout */
-        OMAP_ECC_BCH4_CODE_HW, /* 4-bit BCH ecc code */
-        OMAP_ECC_BCH8_CODE_HW, /* 8-bit BCH ecc code */
-};
-
 /*
  * Note that all values in this struct are in nanoseconds except sync_clk
  * (which is in picoseconds), while the register values are in gpmc_fck cycles.
@@ -133,22 +125,6 @@ struct gpmc_timings {
         u16 wr_data_mux_bus;    /* WRDATAONADMUXBUS */
 };
 
-struct gpmc_nand_regs {
-        void __iomem    *gpmc_status;
-        void __iomem    *gpmc_nand_command;
-        void __iomem    *gpmc_nand_address;
-        void __iomem    *gpmc_nand_data;
-        void __iomem    *gpmc_prefetch_config1;
-        void __iomem    *gpmc_prefetch_config2;
-        void __iomem    *gpmc_prefetch_control;
-        void __iomem    *gpmc_prefetch_status;
-        void __iomem    *gpmc_ecc_config;
-        void __iomem    *gpmc_ecc_control;
-        void __iomem    *gpmc_ecc_size_config;
-        void __iomem    *gpmc_ecc1_result;
-        void __iomem    *gpmc_bch_result0;
-};
-
 extern void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
 extern int gpmc_get_client_irq(unsigned irq_config);