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[Qemu-devel] [PATCH 12/16] S3C NAND controller
From: |
Vincent Sanders |
Subject: |
[Qemu-devel] [PATCH 12/16] S3C NAND controller |
Date: |
Thu, 23 Apr 2009 19:09:36 +0100 |
User-agent: |
Mutt/1.5.17+20080114 (2008-01-14) |
S3C NAND Driver
Signed-off-by: Vincent Sanders <address@hidden>
---
s3c24xx_nand.c | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 136 insertions(+)
diff -urN qemusvnclean/hw/s3c24xx_nand.c qemusvnpatches/hw/s3c24xx_nand.c
--- qemusvnclean/hw/s3c24xx_nand.c 1970-01-01 01:00:00.000000000 +0100
+++ qemusvnpatches/hw/s3c24xx_nand.c 2009-04-23 17:13:06.000000000 +0100
@@ -0,0 +1,136 @@
+/* hw/s3c24xx_nand.c
+ *
+ * Samsung S3C24XX NAND emulation
+ *
+ * Copyright 2006, 2008 Ben Dooks, Daniel Silverstone and Vincent Sanders
+ *
+ * This file is under the terms of the GNU General Public
+ * License Version 2
+ */
+
+#include "hw.h"
+#include "flash.h"
+
+#include "s3c24xx.h"
+
+#define NFCONF 0
+#define NFCMD 1
+#define NFADDR 2
+#define NFDATA 3
+#define NFSTAT 4
+#define NFECC 5
+
+#define NFCE ((soc->nand_reg[NFCONF] & 1<<11) != 0)
+
+static void
+s3c24xx_nand_write_f(void *opaque, target_phys_addr_t addr,
+ uint32_t value)
+{
+ S3CState *soc = (S3CState *)opaque;
+ int reg = (addr & 0x1f) >> 2;
+
+ if ((reg != NFCONF) && ((soc->nand_reg[NFCONF] & 1<<15) == 0)) {
+ return; /* Ignore the write, the nand is not enabled */
+ }
+
+ switch (reg) {
+ case NFCONF:
+ soc->nand_reg[reg] = value;
+ if (soc->nand_chip != NULL)
+ nand_setpins(soc->nand_chip, 0, 0, NFCE, 1, 0);
+ break;
+
+ case NFCMD:
+ soc->nand_reg[reg] = value;
+ if (soc->nand_chip != NULL) {
+ nand_setpins(soc->nand_chip, 1, 0, NFCE, 1, 0);
+ nand_setio(soc->nand_chip, value);
+ }
+ break;
+
+ case NFADDR:
+ soc->nand_reg[reg] = value;
+ if (soc->nand_chip != NULL) {
+ nand_setpins(soc->nand_chip, 0, 1, NFCE, 1, 0);
+ nand_setio(soc->nand_chip, value);
+ }
+ break;
+
+ case NFDATA:
+ soc->nand_reg[reg] = value;
+ if (soc->nand_chip != NULL) {
+ nand_setpins(soc->nand_chip, 0, 0, NFCE, 1, 0);
+ nand_setio(soc->nand_chip, value);
+ }
+ break;
+
+ default:
+ /* Do nothing because the other registers are read only */
+ break;
+ }
+}
+
+static uint32_t
+s3c24xx_nand_read_f(void *opaque, target_phys_addr_t addr)
+{
+ S3CState *soc = (S3CState *)opaque;
+ int reg = (addr & 0x1f) >> 2;
+ uint32_t ret = soc->nand_reg[reg];
+
+ switch (reg) {
+ case NFDATA:
+ if (soc->nand_chip != NULL) {
+ nand_setpins(soc->nand_chip, 0, 0, NFCE, 1, 0);
+ ret = soc->nand_reg[reg] = nand_getio(soc->nand_chip);
+ } else {
+ ret = soc->nand_reg[ret] = 0;
+ }
+ break;
+
+ case NFSTAT:
+ if (soc->nand_chip != NULL) {
+ nand_getpins(soc->nand_chip, (int *)&ret);
+ soc->nand_reg[reg] = ret;
+ } else {
+ ret = soc->nand_reg[ret] = 0;
+ }
+
+ default:
+ /* The rest read-back what was written to them */
+ break;
+ }
+
+ return ret;
+}
+
+static CPUReadMemoryFunc *s3c24xx_nand_read[] = {
+ &s3c24xx_nand_read_f,
+ &s3c24xx_nand_read_f,
+ &s3c24xx_nand_read_f,
+};
+
+static CPUWriteMemoryFunc *s3c24xx_nand_write[] = {
+ &s3c24xx_nand_write_f,
+ &s3c24xx_nand_write_f,
+ &s3c24xx_nand_write_f,
+};
+
+void
+s3c24xx_nand_init(S3CState *soc, target_phys_addr_t base_addr)
+{
+ int tag = cpu_register_io_memory(0, s3c24xx_nand_read, s3c24xx_nand_write,
soc);
+ cpu_register_physical_memory(base_addr, 0x40, tag);
+
+ memset(soc->nand_reg, 0, sizeof(uint32_t) * 5);
+}
+
+void
+s3c24xx_nand_attach(S3CState *soc, struct nand_flash_s *nand_chip)
+{
+ if (soc->nand_chip != NULL) {
+ /* Detach current nand device */
+ /* no cmd, no addr, not enabled, write protected, no 'gnd' */
+ nand_setpins(soc->nand_chip, 0, 0, 1, 0, 0);
+ }
+ soc->nand_chip = nand_chip;
+}
--
Regards Vincent
http://www.kyllikki.org/
- [Qemu-devel] [PATCH 2/16] Add s3c SOC header, (continued)
- [Qemu-devel] [PATCH 2/16] Add s3c SOC header, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 3/16] S3C SDRAM memory controller Peripheral, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 4/16] S3C irq controller, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 05/16] S3C Clock controller peripheral, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 7/16] S3C serial peripheral, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 6/16] S3C Timers, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 8/16] S3C Real Time Clock, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 9/16] S3C General Purpose IO, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 10/16] S3C I2C peripheral, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 11/16] S3C LCD display, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 12/16] S3C NAND controller,
Vincent Sanders <=
- [Qemu-devel] [PATCH 13/16] S3C2410 SOC implementation, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 14/16] S3C2440 SOC impementation, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 15/16] Add S3C SOC files to Makefile, Vincent Sanders, 2009/04/23
- [Qemu-devel] [PATCH 16/16] Add two boards which use S3C2410 SOC, Vincent Sanders, 2009/04/23