Add NAND FLASH support for AMCC Bamboo 440EP eval board
Patch by Stefan Roese, 11 Aug 2005
diff --git a/board/amcc/bamboo/bamboo.c b/board/amcc/bamboo/bamboo.c
index 0d5ab71..d02add5 100644
--- a/board/amcc/bamboo/bamboo.c
+++ b/board/amcc/bamboo/bamboo.c
@@ -29,6 +29,7 @@
void ext_bus_cntlr_init(void);
void configure_ppc440ep_pins(void);
+int is_nand_selected(void);
gpio_param_s gpio_tab[GPIO_GROUP_MAX][GPIO_MAX];
#if 0
@@ -132,10 +133,10 @@
EBC0_BNCR_BW_8BIT
#define EBC0_BNCR_SMALL_FLASH_CS4 \
- EBC0_BNCR_BAS_ENCODE(0x87800000) | \
- EBC0_BNCR_BS_8MB | \
+ EBC0_BNCR_BAS_ENCODE(0x87F00000) | \
+ EBC0_BNCR_BS_1MB | \
EBC0_BNCR_BU_RW | \
- EBC0_BNCR_BW_16BIT
+ EBC0_BNCR_BW_8BIT
/* Large Flash or SRAM */
#define EBC0_BNAP_LARGE_FLASH_OR_SRAM \
@@ -273,6 +274,87 @@
return 0;
}
+#if (CONFIG_COMMANDS & CFG_CMD_NAND)
+#include <linux/mtd/nand.h>
+extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];
+
+/*----------------------------------------------------------------------------+
+ | nand_reset.
+ | Reset Nand flash
+ | This routine will abort previous cmd
+ +----------------------------------------------------------------------------*/
+int nand_reset(ulong addr)
+{
+ int wait=0, stat=0;
+
+ out8(addr + NAND_CMD_REG, NAND0_CMD_RESET);
+ out8(addr + NAND_CMD_REG, NAND0_CMD_READ_STATUS);
+
+ while ((stat != 0xc0) && (wait != 0xffff)) {
+ stat = in8(addr + NAND_DATA_REG);
+ wait++;
+ }
+
+ if (stat == 0xc0) {
+ return 0;
+ } else {
+ printf("NAND Reset timeout.\n");
+ return -1;
+ }
+}
+
+void board_nand_set_device(int cs, ulong addr)
+{
+ /* Set NandFlash Core Configuration Register */
+ out32(addr + NAND_CCR_REG, 0x00001000 | (cs << 24));
+
+ switch (cs) {
+ case 1:
+ /* -------
+ * NAND0
+ * -------
+ * K9F1208U0A : 4 addr cyc, 1 col + 3 Row
+ * Set NDF1CR - Enable External CS1 in NAND FLASH controller
+ */
+ out32(addr + NAND_CR1_REG, 0x80002222);
+ break;
+
+ case 2:
+ /* -------
+ * NAND1
+ * -------
+ * K9K2G0B : 5 addr cyc, 2 col + 3 Row
+ * Set NDF2CR : Enable External CS2 in NAND FLASH controller
+ */
+ out32(addr + NAND_CR2_REG, 0xC0007777);
+ break;
+ }
+
+ /* Perform Reset Command */
+ if (nand_reset(addr) != 0)
+ return;
+}
+
+void nand_init(void)
+{
+ board_nand_set_device(1, CFG_NAND_ADDR);
+
+ nand_probe(CFG_NAND_ADDR);
+ if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN) {
+ print_size(nand_dev_desc[0].totlen, "\n");
+ }
+
+#if 0 /* NAND1 not supported yet */
+ board_nand_set_device(2, CFG_NAND2_ADDR);
+
+ nand_probe(CFG_NAND2_ADDR);
+ if (nand_dev_desc[0].ChipID != NAND_ChipID_UNKNOWN) {
+ print_size(nand_dev_desc[0].totlen, "\n");
+ }
+#endif
+}
+#endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */
+
int checkboard(void)
{
sys_info_t sysinfo;
@@ -585,7 +667,11 @@
+----------------------------------------------------------------------------*/
int is_nand_selected(void)
{
- return FALSE; /* test-only */
+#ifdef CONFIG_BAMBOO_NAND
+ return TRUE;
+#else
+ return FALSE;
+#endif
}
/*----------------------------------------------------------------------------+
@@ -829,12 +915,8 @@
/* NAND Flash */
ebc0_cs1_bnap_value = EBC0_BNAP_NAND_FLASH;
ebc0_cs1_bncr_value = EBC0_BNCR_NAND_FLASH_CS1;
- /*ebc0_cs2_bnap_value = EBC0_BNAP_NAND_FLASH;
- ebc0_cs2_bncr_value = EBC0_BNCR_NAND_FLASH_CS2;
- ebc0_cs3_bnap_value = EBC0_BNAP_NAND_FLASH;
- ebc0_cs3_bncr_value = EBC0_BNCR_NAND_FLASH_CS3;*/
- ebc0_cs2_bnap_value = 0;
- ebc0_cs2_bncr_value = 0;
+ ebc0_cs2_bnap_value = EBC0_BNAP_NAND_FLASH;
+ ebc0_cs2_bncr_value = EBC0_BNCR_NAND_FLASH_CS2;
ebc0_cs3_bnap_value = 0;
ebc0_cs3_bncr_value = 0;
} else {
@@ -985,7 +1067,7 @@
+----------------------------------------------------------------------------*/
uart_config_nb_t get_uart_configuration(void)
{
- return (L4); /* test-only */
+ return (L4);
}
/*----------------------------------------------------------------------------+
@@ -1132,8 +1214,7 @@
fpga_selection_1_reg = in8(FPGA_SELECTION_1_REG) &~FPGA_SEL_1_REG_NF_SELEC_MASK;
fpga_selection_1_reg |= FPGA_SEL_1_REG_NF0_SEL_BY_NFCS1;
- /*fpga_selection_1_reg |= FPGA_SEL_1_REG_NF1_SEL_BY_NFCS2; */
- /*fpga_selection_1_reg |= FPGA_SEL_1_REG_NF1_SEL_BY_NFCS3; */
+ fpga_selection_1_reg |= FPGA_SEL_1_REG_NF1_SEL_BY_NFCS2;
out8(FPGA_SELECTION_1_REG,fpga_selection_1_reg);
}
@@ -1725,11 +1806,15 @@
*(core_select_P+UIC_0_3) = CORE_SELECTED;
*(core_select_P+UIC_4_9) = CORE_SELECTED;
- *(core_select_P+SCP_CORE) = CORE_SELECTED;
- *(core_select_P+DMA_CHANNEL_CD) = CORE_SELECTED;
- *(core_select_P+PACKET_REJ_FUNC_AVAIL) = CORE_SELECTED;
+ *(core_select_P+SCP_CORE) = CORE_SELECTED;
+ *(core_select_P+DMA_CHANNEL_CD) = CORE_SELECTED;
+ *(core_select_P+PACKET_REJ_FUNC_AVAIL) = CORE_SELECTED;
*(core_select_P+USB1_DEVICE) = CORE_SELECTED;
+ if (is_nand_selected()) {
+ *(core_select_P+NAND_FLASH) = CORE_SELECTED;
+ }
+
*config_val_P = CONFIG_IS_VALID;
}
@@ -1901,9 +1986,8 @@
SDR0_CUST0_NDFC_ENABLE |
SDR0_CUST0_NDFC_BW_8_BIT |
SDR0_CUST0_NDFC_ARE_MASK |
- SDR0_CUST0_CHIPSELGAT_EN1 );
- /*SDR0_CUST0_CHIPSELGAT_EN2 ); */
- /*SDR0_CUST0_CHIPSELGAT_EN3 ); */
+ SDR0_CUST0_CHIPSELGAT_EN1 |
+ SDR0_CUST0_CHIPSELGAT_EN2);
ndfc_selection_in_fpga();
}
diff --git a/board/amcc/bamboo/flash.c b/board/amcc/bamboo/flash.c
index 97a4b98..a30ab7a 100644
--- a/board/amcc/bamboo/flash.c
+++ b/board/amcc/bamboo/flash.c
@@ -50,15 +50,16 @@
/*
* Mark big flash bank (16 bit instead of 8 bit access) in address with bit 0
*/
-static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = {
+static unsigned long flash_addr_table[][CFG_MAX_FLASH_BANKS] = {
{0x87800001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
{0x00000000, 0x00000000, 0x00000000}, /* 1:boot from pci 66 */
{0x00000000, 0x00000000, 0x00000000}, /* 2:boot from nand flash */
- {0x87800000, 0x87880000, 0xFF800001}, /* 3:boot from big flash 33*/
- {0x87800000, 0x87880000, 0xFF800001}, /* 4:boot from big flash 66*/
+ {0x87F00000, 0x87F80000, 0xFFC00001}, /* 3:boot from big flash 33*/
+ {0x87F00000, 0x87F80000, 0xFFC00001}, /* 4:boot from big flash 66*/
{0x00000000, 0x00000000, 0x00000000}, /* 5:boot from */
{0x00000000, 0x00000000, 0x00000000}, /* 6:boot from pci 66 */
{0x00000000, 0x00000000, 0x00000000}, /* 7:boot from */
+ {0x87C00001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
};
/*
@@ -117,6 +118,10 @@
index = 2;
break;
}
+ } else if (index == 0) {
+ if (in8(FPGA_SETTING_REG) & FPGA_SET_REG_OP_CODE_FLASH_ABOVE) {
+ index = 8; /* sram below op code flash -> new index 8 */
+ }
}
DEBUGF("\n");
diff --git a/board/amcc/bamboo/init.S b/board/amcc/bamboo/init.S
index 9070293..7820107 100644
--- a/board/amcc/bamboo/init.S
+++ b/board/amcc/bamboo/init.S
@@ -86,14 +86,20 @@
tlbtab:
tlbtab_start
- /*
- 0xf0000000 must be first, before relocation SA_I must be off to use the
- dcache as stack. It is patched after relocation to enable SA_I
- */
- tlbentry( 0xf0000000, SZ_256M, 0xf0000000, 0, AC_R|AC_W|AC_X|SA_G/*|SA_I*/)
- tlbentry( CFG_SDRAM_BASE, SZ_256M, 0x00000000, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
- tlbentry( CFG_PCI_BASE, SZ_256M, 0xE0000000, 0, AC_R|AC_W|SA_G|SA_I )
- tlbentry( CFG_NVRAM_BASE_ADDR, SZ_256M, 0x80000000, 0, AC_R|AC_W|AC_X|SA_W|SA_I )
+
+ /*
+ * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the
+ * speed up boot process. It is patched after relocation to enable SA_I
+ */
+ tlbentry( CFG_BOOT_BASE_ADDR, SZ_256M, CFG_BOOT_BASE_ADDR, 0, AC_R|AC_W|AC_X|SA_G/*|SA_I*/)
+
+ /* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
+ tlbentry( CFG_INIT_RAM_ADDR, SZ_64K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G )
+
+ tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
+ tlbentry( CFG_PCI_BASE, SZ_256M, CFG_PCI_BASE, 0, AC_R|AC_W|SA_G|SA_I )
+ tlbentry( CFG_NVRAM_BASE_ADDR, SZ_256M, CFG_NVRAM_BASE_ADDR, 0, AC_R|AC_W|AC_X|SA_W|SA_I )
+ tlbentry( CFG_NAND_ADDR, SZ_256M, CFG_NAND_ADDR, 0, AC_R|AC_W|AC_X|SA_W|SA_I )
/* PCI */
tlbentry( CFG_PCI_MEMBASE, SZ_256M, CFG_PCI_MEMBASE, 0, AC_R|AC_W|SA_G|SA_I )
@@ -102,6 +108,6 @@
tlbentry( CFG_PCI_MEMBASE3, SZ_256M, CFG_PCI_MEMBASE3, 0, AC_R|AC_W|SA_G|SA_I )
/* USB 2.0 Device */
- tlbentry( CFG_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_R|AC_W|SA_G|SA_I )
+ tlbentry( CFG_USB_DEVICE, SZ_1K, CFG_USB_DEVICE, 0, AC_R|AC_W|SA_G|SA_I )
tlbtab_end