[U-Boot] [PATCH] mtd: sf: Zap ramtron driver

6 Nov 2014

Removed ramtron driver since the EMK boards are
no longer been active, and these are the only boards
used this flash driver.
Commit details for EMK zap:
"ppc/arm: zap EMK boards"
(sha1: d58a9451e7339ed4cf2b2627e534611f427fb791)
Signed-off-by: Jagannadha Sutradharudu Teki jagannadh.teki@gmail.com
Cc: Reinhard Meyer reinhard.meyer@emk-elektronik.de
---
 drivers/mtd/spi/Makefile  |   1 -
 drivers/mtd/spi/ramtron.c | 404 ----------------------------------------------
 2 files changed, 405 deletions(-)
 delete mode 100644 drivers/mtd/spi/ramtron.c

diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index 15789a0..c61b784 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -17,6 +17,5 @@ obj-$(CONFIG_SPI_FLASH) += sf_probe.o
 #endif
 obj-$(CONFIG_CMD_SF) += sf.o
 obj-$(CONFIG_SPI_FLASH) += sf_ops.o sf_params.o
-obj-$(CONFIG_SPI_FRAM_RAMTRON) += ramtron.o
 obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o
 obj-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
diff --git a/drivers/mtd/spi/ramtron.c b/drivers/mtd/spi/ramtron.c
deleted file mode 100644
index a23032c..0000000
--- a/drivers/mtd/spi/ramtron.c
+++ /dev/null
@@ -1,404 +0,0 @@
-/*
- * (C) Copyright 2010
- * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-/*
- * Note: RAMTRON SPI FRAMs are ferroelectric, nonvolatile RAMs
- * with an interface identical to SPI flash devices.
- * However since they behave like RAM there are no delays or
- * busy polls required. They can sustain read or write at the
- * allowed SPI bus speed, which can be 40 MHz for some devices.
- *
- * Unfortunately some RAMTRON devices do not have a means of
- * identifying them. They will leave the SO line undriven when
- * the READ-ID command is issued. It is therefore mandatory
- * that the MISO line has a proper pull-up, so that READ-ID
- * will return a row of 0xff. This 0xff pseudo-id will cause
- * probes by all vendor specific functions that are designed
- * to handle it. If the MISO line is not pulled up, READ-ID
- * could return any random noise, even mimicking another
- * device.
- *
- * We use CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
- * to define which device will be assumed after a simple status
- * register verify. This method is prone to false positive
- * detection and should therefore be the last to be tried.
- * Enter it in the last position in the table in spi_flash.c!
- *
- * The define CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC both activates
- * compilation of the special handler and defines the device
- * to assume.
- */
-
-#include <common.h>
-#include <malloc.h>
-#include <spi.h>
-#include <spi_flash.h>
-#include "sf_internal.h"
-
-/*
- * Properties of supported FRAMs
- * Note: speed is currently not used because we have no method to deliver that
- * value to the upper layers
- */
-struct ramtron_spi_fram_params {
-	u32	size;		/* size in bytes */
-	u8	addr_len;	/* number of address bytes */
-	u8	merge_cmd;	/* some address bits are in the command byte */
-	u8	id1;		/* device ID 1 (family, density) */
-	u8	id2;		/* device ID 2 (sub, rev, rsvd) */
-	u32	speed;		/* max. SPI clock in Hz */
-	const char *name;	/* name for display and/or matching */
-};
-
-struct ramtron_spi_fram {
-	struct spi_flash flash;
-	const struct ramtron_spi_fram_params *params;
-};
-
-static inline struct ramtron_spi_fram *to_ramtron_spi_fram(struct spi_flash
-							     *flash)
-{
-	return container_of(flash, struct ramtron_spi_fram, flash);
-}
-
-/*
- * table describing supported FRAM chips:
- * chips without RDID command must have the values 0xff for id1 and id2
- */
-static const struct ramtron_spi_fram_params ramtron_spi_fram_table[] = {
-	{
-		.size = 32*1024,
-		.addr_len = 2,
-		.merge_cmd = 0,
-		.id1 = 0x22,
-		.id2 = 0x00,
-		.speed = 40000000,
-		.name = "FM25V02",
-	},
-	{
-		.size = 32*1024,
-		.addr_len = 2,
-		.merge_cmd = 0,
-		.id1 = 0x22,
-		.id2 = 0x01,
-		.speed = 40000000,
-		.name = "FM25VN02",
-	},
-	{
-		.size = 64*1024,
-		.addr_len = 2,
-		.merge_cmd = 0,
-		.id1 = 0x23,
-		.id2 = 0x00,
-		.speed = 40000000,
-		.name = "FM25V05",
-	},
-	{
-		.size = 64*1024,
-		.addr_len = 2,
-		.merge_cmd = 0,
-		.id1 = 0x23,
-		.id2 = 0x01,
-		.speed = 40000000,
-		.name = "FM25VN05",
-	},
-	{
-		.size = 128*1024,
-		.addr_len = 3,
-		.merge_cmd = 0,
-		.id1 = 0x24,
-		.id2 = 0x00,
-		.speed = 40000000,
-		.name = "FM25V10",
-	},
-	{
-		.size = 128*1024,
-		.addr_len = 3,
-		.merge_cmd = 0,
-		.id1 = 0x24,
-		.id2 = 0x01,
-		.speed = 40000000,
-		.name = "FM25VN10",
-	},
-#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
-	{
-		.size = 256*1024,
-		.addr_len = 3,
-		.merge_cmd = 0,
-		.id1 = 0xff,
-		.id2 = 0xff,
-		.speed = 40000000,
-		.name = "FM25H20",
-	},
-#endif
-};
-
-static int ramtron_common(struct spi_flash *flash,
-		u32 offset, size_t len, void *buf, u8 command)
-{
-	struct ramtron_spi_fram *sn = to_ramtron_spi_fram(flash);
-	u8 cmd[4];
-	int cmd_len;
-	int ret;
-
-	if (sn->params->addr_len == 3 && sn->params->merge_cmd == 0) {
-		cmd[0] = command;
-		cmd[1] = offset >> 16;
-		cmd[2] = offset >> 8;
-		cmd[3] = offset;
-		cmd_len = 4;
-	} else if (sn->params->addr_len == 2 && sn->params->merge_cmd == 0) {
-		cmd[0] = command;
-		cmd[1] = offset >> 8;
-		cmd[2] = offset;
-		cmd_len = 3;
-	} else {
-		printf("SF: unsupported addr_len or merge_cmd\n");
-		return -1;
-	}
-
-	/* claim the bus */
-	ret = spi_claim_bus(flash->spi);
-	if (ret) {
-		debug("SF: Unable to claim SPI bus\n");
-		return ret;
-	}
-
-	if (command == CMD_PAGE_PROGRAM) {
-		/* send WREN */
-		ret = spi_flash_cmd_write_enable(flash);
-		if (ret < 0) {
-			debug("SF: Enabling Write failed\n");
-			goto releasebus;
-		}
-	}
-
-	/* do the transaction */
-	if (command == CMD_PAGE_PROGRAM)
-		ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len, buf, len);
-	else
-		ret = spi_flash_cmd_read(flash->spi, cmd, cmd_len, buf, len);
-	if (ret < 0)
-		debug("SF: Transaction failed\n");
-
-releasebus:
-	/* release the bus */
-	spi_release_bus(flash->spi);
-	return ret;
-}
-
-static int ramtron_read(struct spi_flash *flash,
-		u32 offset, size_t len, void *buf)
-{
-	return ramtron_common(flash, offset, len, buf,
-		CMD_READ_ARRAY_SLOW);
-}
-
-static int ramtron_write(struct spi_flash *flash,
-		u32 offset, size_t len, const void *buf)
-{
-	return ramtron_common(flash, offset, len, (void *)buf,
-		CMD_PAGE_PROGRAM);
-}
-
-static int ramtron_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	debug("SF: Erase of RAMTRON FRAMs is pointless\n");
-	return -1;
-}
-
-/*
- * nore: we are called here with idcode pointing to the first non-0x7f byte
- * already!
- */
-static struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi,
-		u8 *idcode)
-{
-	const struct ramtron_spi_fram_params *params;
-	struct ramtron_spi_fram *sn;
-	unsigned int i;
-#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
-	int ret;
-	u8 sr;
-#endif
-
-	/* NOTE: the bus has been claimed before this function is called! */
-	switch (idcode[0]) {
-	case 0xc2:
-		/* JEDEC conformant RAMTRON id */
-		for (i = 0; i < ARRAY_SIZE(ramtron_spi_fram_table); i++) {
-			params = &ramtron_spi_fram_table[i];
-			if (idcode[1] == params->id1 &&
-			    idcode[2] == params->id2)
-				goto found;
-		}
-		break;
-#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
-	case 0xff:
-		/*
-		 * probably open MISO line, pulled up.
-		 * We COULD have a non JEDEC conformant FRAM here,
-		 * read the status register to verify
-		 */
-		ret = spi_flash_cmd(spi, CMD_READ_STATUS, &sr, 1);
-		if (ret)
-			return NULL;
-
-		/* Bits 5,4,0 are fixed 0 for all devices */
-		if ((sr & 0x31) != 0x00)
-			return NULL;
-		/* now find the device */
-		for (i = 0; i < ARRAY_SIZE(ramtron_spi_fram_table); i++) {
-			params = &ramtron_spi_fram_table[i];
-			if (!strcmp(params->name,
-				    CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC))
-				goto found;
-		}
-		debug("SF: Unsupported non-JEDEC RAMTRON device "
-			CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC "\n");
-		break;
-#endif
-	default:
-		break;
-	}
-
-	/* arriving here means no method has found a device we can handle */
-	debug("SF/ramtron: unsupported device id0=%02x id1=%02x id2=%02x\n",
-	      idcode[0], idcode[1], idcode[2]);
-	return NULL;
-
-found:
-	sn = malloc(sizeof(*sn));
-	if (!sn) {
-		debug("SF: Failed to allocate memory\n");
-		return NULL;
-	}
-
-	sn->params = params;
-
-	sn->flash.write = ramtron_write;
-	sn->flash.read = ramtron_read;
-	sn->flash.erase = ramtron_erase;
-	sn->flash.size = params->size;
-
-	return &sn->flash;
-}
-
-/*
- * The following table holds all device probe functions
- * (All flashes are removed and implemented a common probe at
- *  spi_flash_probe.c)
- *
- * shift:  number of continuation bytes before the ID
- * idcode: the expected IDCODE or 0xff for non JEDEC devices
- * probe:  the function to call
- *
- * Non JEDEC devices should be ordered in the table such that
- * the probe functions with best detection algorithms come first.
- *
- * Several matching entries are permitted, they will be tried
- * in sequence until a probe function returns non NULL.
- *
- * IDCODE_CONT_LEN may be redefined if a device needs to declare a
- * larger "shift" value.  IDCODE_PART_LEN generally shouldn't be
- * changed.  This is the max number of bytes probe functions may
- * examine when looking up part-specific identification info.
- *
- * Probe functions will be given the idcode buffer starting at their
- * manu id byte (the "idcode" in the table below).  In other words,
- * all of the continuation bytes will be skipped (the "shift" below).
- */
-#define IDCODE_CONT_LEN 0
-#define IDCODE_PART_LEN 5
-static const struct {
-	const u8 shift;
-	const u8 idcode;
-	struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
-} flashes[] = {
-	/* Keep it sorted by define name */
-#ifdef CONFIG_SPI_FRAM_RAMTRON
-	{ 6, 0xc2, spi_fram_probe_ramtron, },
-# undef IDCODE_CONT_LEN
-# define IDCODE_CONT_LEN 6
-#endif
-#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
-	{ 0, 0xff, spi_fram_probe_ramtron, },
-#endif
-};
-#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
-
-struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
-		unsigned int max_hz, unsigned int spi_mode)
-{
-	struct spi_slave *spi;
-	struct spi_flash *flash = NULL;
-	int ret, i, shift;
-	u8 idcode[IDCODE_LEN], *idp;
-
-	spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
-	if (!spi) {
-		printf("SF: Failed to set up slave\n");
-		return NULL;
-	}
-
-	ret = spi_claim_bus(spi);
-	if (ret) {
-		debug("SF: Failed to claim SPI bus: %d\n", ret);
-		goto err_claim_bus;
-	}
-
-	/* Read the ID codes */
-	ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
-	if (ret)
-		goto err_read_id;
-
-#ifdef DEBUG
-	printf("SF: Got idcodes\n");
-	print_buffer(0, idcode, 1, sizeof(idcode), 0);
-#endif
-
-	/* count the number of continuation bytes */
-	for (shift = 0, idp = idcode;
-	     shift < IDCODE_CONT_LEN && *idp == 0x7f;
-	     ++shift, ++idp)
-		continue;
-
-	/* search the table for matches in shift and id */
-	for (i = 0; i < ARRAY_SIZE(flashes); ++i)
-		if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
-			/* we have a match, call probe */
-			flash = flashes[i].probe(spi, idp);
-			if (flash)
-				break;
-		}
-
-	if (!flash) {
-		printf("SF: Unsupported manufacturer %02x\n", *idp);
-		goto err_manufacturer_probe;
-	}
-
-	printf("SF: Detected %s with total size ", flash->name);
-	print_size(flash->size, "");
-	puts("\n");
-
-	spi_release_bus(spi);
-
-	return flash;
-
-err_manufacturer_probe:
-err_read_id:
-	spi_release_bus(spi);
-err_claim_bus:
-	spi_free_slave(spi);
-	return NULL;
-}
-
-void spi_flash_free(struct spi_flash *flash)
-{
-	spi_free_slave(flash->spi);
-	free(flash);
-}
-- 
1.9.1


    

Jagannadha Sutradharudu Teki

Jagan Teki

-}

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