[Blackfin][PATCH] Add BF537 stamp board support
diff --git a/board/bf537-stamp/post-memory.c b/board/bf537-stamp/post-memory.c
new file mode 100644
index 0000000..6039350
--- /dev/null
+++ b/board/bf537-stamp/post-memory.c
@@ -0,0 +1,322 @@
+#include <common.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_POST
+
+#include <post.h>
+#include <watchdog.h>
+
+#if CONFIG_POST & CFG_POST_MEMORY
+#define CLKIN 25000000
+#define PATTERN1 0x5A5A5A5A
+#define PATTERN2 0xAAAAAAAA
+
+#define CCLK_NUM 4
+#define SCLK_NUM 3
+
+void post_out_buff(char *buff);
+int post_key_pressed(void);
+void post_init_pll(int mult, int div);
+int post_init_sdram(int sclk);
+void post_init_uart(int sclk);
+
+const int pll[CCLK_NUM][SCLK_NUM][2] = {
+ {{20, 4}, {20, 5}, {20, 10}}, /* CCLK = 500M */
+ {{16, 4}, {16, 5}, {16, 8}}, /* CCLK = 400M */
+ {{8, 2}, {8, 4}, {8, 5}}, /* CCLK = 200M */
+ {{4, 1}, {4, 2}, {4, 4}} /* CCLK = 100M */
+};
+const char *const log[CCLK_NUM][SCLK_NUM] = {
+ {"CCLK-500Mhz SCLK-125Mhz: Writing...\0",
+ "CCLK-500Mhz SCLK-100Mhz: Writing...\0",
+ "CCLK-500Mhz SCLK- 50Mhz: Writing...\0",},
+ {"CCLK-400Mhz SCLK-100Mhz: Writing...\0",
+ "CCLK-400Mhz SCLK- 80Mhz: Writing...\0",
+ "CCLK-400Mhz SCLK- 50Mhz: Writing...\0",},
+ {"CCLK-200Mhz SCLK-100Mhz: Writing...\0",
+ "CCLK-200Mhz SCLK- 50Mhz: Writing...\0",
+ "CCLK-200Mhz SCLK- 40Mhz: Writing...\0",},
+ {"CCLK-100Mhz SCLK-100Mhz: Writing...\0",
+ "CCLK-100Mhz SCLK- 50Mhz: Writing...\0",
+ "CCLK-100Mhz SCLK- 25Mhz: Writing...\0",},
+};
+
+int memory_post_test(int flags)
+{
+ int addr;
+ int m, n;
+ int sclk, sclk_temp;
+ int ret = 1;
+
+ sclk_temp = CLKIN / 1000000;
+ sclk_temp = sclk_temp * CONFIG_VCO_MULT;
+ for (sclk = 0; sclk_temp > 0; sclk++)
+ sclk_temp -= CONFIG_SCLK_DIV;
+ sclk = sclk * 1000000;
+ post_init_uart(sclk);
+ if (post_key_pressed() == 0)
+ return 0;
+
+ for (m = 0; m < CCLK_NUM; m++) {
+ for (n = 0; n < SCLK_NUM; n++) {
+ /* Calculate the sclk */
+ sclk_temp = CLKIN / 1000000;
+ sclk_temp = sclk_temp * pll[m][n][0];
+ for (sclk = 0; sclk_temp > 0; sclk++)
+ sclk_temp -= pll[m][n][1];
+ sclk = sclk * 1000000;
+
+ post_init_pll(pll[m][n][0], pll[m][n][1]);
+ post_init_sdram(sclk);
+ post_init_uart(sclk);
+ post_out_buff("\n\r\0");
+ post_out_buff(log[m][n]);
+ for (addr = 0x0; addr < CFG_MAX_RAM_SIZE; addr += 4)
+ *(unsigned long *)addr = PATTERN1;
+ post_out_buff("Reading...\0");
+ for (addr = 0x0; addr < CFG_MAX_RAM_SIZE; addr += 4) {
+ if ((*(unsigned long *)addr) != PATTERN1) {
+ post_out_buff("Error\n\r\0");
+ ret = 0;
+ }
+ }
+ post_out_buff("OK\n\r\0");
+ }
+ }
+ if (ret)
+ post_out_buff("memory POST passed\n\r\0");
+ else
+ post_out_buff("memory POST failed\n\r\0");
+
+ post_out_buff("\n\r\n\r\0");
+ return 1;
+}
+
+void post_init_uart(int sclk)
+{
+ int divisor;
+
+ for (divisor = 0; sclk > 0; divisor++)
+ sclk -= 57600 * 16;
+
+ *pPORTF_FER = 0x000F;
+ *pPORTH_FER = 0xFFFF;
+
+ *pUART_GCTL = 0x00;
+ *pUART_LCR = 0x83;
+ sync();
+ *pUART_DLL = (divisor & 0xFF);
+ sync();
+ *pUART_DLH = ((divisor >> 8) & 0xFF);
+ sync();
+ *pUART_LCR = 0x03;
+ sync();
+ *pUART_GCTL = 0x01;
+ sync();
+}
+
+void post_out_buff(char *buff)
+{
+
+ int i = 0;
+ for (i = 0; i < 0x80000; i++) ;
+ i = 0;
+ while ((buff[i] != '\0') && (i != 100)) {
+ while (!(*pUART_LSR & 0x20)) ;
+ *pUART_THR = buff[i];
+ sync();
+ i++;
+ }
+ for (i = 0; i < 0x80000; i++) ;
+}
+
+/* Using sw10-PF5 as the hotkey */
+#define KEY_LOOP 0x80000
+#define KEY_DELAY 0x80
+int post_key_pressed(void)
+{
+ int i, n;
+ unsigned short value;
+
+ *pPORTF_FER &= ~PF5;
+ *pPORTFIO_DIR &= ~PF5;
+ *pPORTFIO_INEN |= PF5;
+ sync();
+
+ post_out_buff("########Press SW10 to enter Memory POST########: 3\0");
+ for (i = 0; i < KEY_LOOP; i++) {
+ value = *pPORTFIO & PF5;
+ if (*pUART0_RBR == 0x0D) {
+ value = 0;
+ goto key_pressed;
+ }
+ if (value != 0) {
+ goto key_pressed;
+ }
+ for (n = 0; n < KEY_DELAY; n++)
+ asm("nop");
+ }
+ post_out_buff("\b2\0");
+
+ for (i = 0; i < KEY_LOOP; i++) {
+ value = *pPORTFIO & PF5;
+ if (*pUART0_RBR == 0x0D) {
+ value = 0;
+ goto key_pressed;
+ }
+ if (value != 0) {
+ goto key_pressed;
+ }
+ for (n = 0; n < KEY_DELAY; n++)
+ asm("nop");
+ }
+ post_out_buff("\b1\0");
+
+ for (i = 0; i < KEY_LOOP; i++) {
+ value = *pPORTFIO & PF5;
+ if (*pUART0_RBR == 0x0D) {
+ value = 0;
+ goto key_pressed;
+ }
+ if (value != 0) {
+ goto key_pressed;
+ }
+ for (n = 0; n < KEY_DELAY; n++)
+ asm("nop");
+ }
+ key_pressed:
+ post_out_buff("\b0");
+ post_out_buff("\n\r\0");
+ if (value == 0)
+ return 0;
+ post_out_buff("Hotkey has been pressed, Enter POST . . . . . .\n\r\0");
+ return 1;
+}
+
+void post_init_pll(int mult, int div)
+{
+
+ *pSIC_IWR = 0x01;
+ *pPLL_CTL = (mult << 9);
+ *pPLL_DIV = div;
+ asm("CLI R2;");
+ asm("IDLE;");
+ asm("STI R2;");
+ while (!(*pPLL_STAT & 0x20)) ;
+}
+
+int post_init_sdram(int sclk)
+{
+ int SDRAM_tRP, SDRAM_tRP_num, SDRAM_tRAS, SDRAM_tRAS_num, SDRAM_tRCD,
+ SDRAM_tWR;
+ int SDRAM_Tref, SDRAM_NRA, SDRAM_CL, SDRAM_SIZE, SDRAM_WIDTH,
+ mem_SDGCTL, mem_SDBCTL, mem_SDRRC;
+
+ if ((sclk > 119402985)) {
+ SDRAM_tRP = TRP_2;
+ SDRAM_tRP_num = 2;
+ SDRAM_tRAS = TRAS_7;
+ SDRAM_tRAS_num = 7;
+ SDRAM_tRCD = TRCD_2;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 104477612) && (sclk <= 119402985)) {
+ SDRAM_tRP = TRP_2;
+ SDRAM_tRP_num = 2;
+ SDRAM_tRAS = TRAS_6;
+ SDRAM_tRAS_num = 6;
+ SDRAM_tRCD = TRCD_2;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 89552239) && (sclk <= 104477612)) {
+ SDRAM_tRP = TRP_2;
+ SDRAM_tRP_num = 2;
+ SDRAM_tRAS = TRAS_5;
+ SDRAM_tRAS_num = 5;
+ SDRAM_tRCD = TRCD_2;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 74626866) && (sclk <= 89552239)) {
+ SDRAM_tRP = TRP_2;
+ SDRAM_tRP_num = 2;
+ SDRAM_tRAS = TRAS_4;
+ SDRAM_tRAS_num = 4;
+ SDRAM_tRCD = TRCD_2;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 66666667) && (sclk <= 74626866)) {
+ SDRAM_tRP = TRP_2;
+ SDRAM_tRP_num = 2;
+ SDRAM_tRAS = TRAS_3;
+ SDRAM_tRAS_num = 3;
+ SDRAM_tRCD = TRCD_2;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 59701493) && (sclk <= 66666667)) {
+ SDRAM_tRP = TRP_1;
+ SDRAM_tRP_num = 1;
+ SDRAM_tRAS = TRAS_4;
+ SDRAM_tRAS_num = 4;
+ SDRAM_tRCD = TRCD_1;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 44776119) && (sclk <= 59701493)) {
+ SDRAM_tRP = TRP_1;
+ SDRAM_tRP_num = 1;
+ SDRAM_tRAS = TRAS_3;
+ SDRAM_tRAS_num = 3;
+ SDRAM_tRCD = TRCD_1;
+ SDRAM_tWR = TWR_2;
+ } else if ((sclk > 29850746) && (sclk <= 44776119)) {
+ SDRAM_tRP = TRP_1;
+ SDRAM_tRP_num = 1;
+ SDRAM_tRAS = TRAS_2;
+ SDRAM_tRAS_num = 2;
+ SDRAM_tRCD = TRCD_1;
+ SDRAM_tWR = TWR_2;
+ } else if (sclk <= 29850746) {
+ SDRAM_tRP = TRP_1;
+ SDRAM_tRP_num = 1;
+ SDRAM_tRAS = TRAS_1;
+ SDRAM_tRAS_num = 1;
+ SDRAM_tRCD = TRCD_1;
+ SDRAM_tWR = TWR_2;
+ } else {
+ SDRAM_tRP = TRP_1;
+ SDRAM_tRP_num = 1;
+ SDRAM_tRAS = TRAS_1;
+ SDRAM_tRAS_num = 1;
+ SDRAM_tRCD = TRCD_1;
+ SDRAM_tWR = TWR_2;
+ }
+ /*SDRAM INFORMATION: */
+ SDRAM_Tref = 64; /* Refresh period in milliseconds */
+ SDRAM_NRA = 4096; /* Number of row addresses in SDRAM */
+ SDRAM_CL = CL_3; /* 2 */
+
+ SDRAM_SIZE = EBSZ_64;
+ SDRAM_WIDTH = EBCAW_10;
+
+ mem_SDBCTL = SDRAM_WIDTH | SDRAM_SIZE | EBE;
+
+ /* Equation from section 17 (p17-46) of BF533 HRM */
+ mem_SDRRC =
+ (((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) -
+ (SDRAM_tRAS_num + SDRAM_tRP_num);
+
+ /* Enable SCLK Out */
+ mem_SDGCTL =
+ (SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR
+ | PSS);
+
+ sync();
+
+ *pEBIU_SDGCTL |= 0x1000000;
+ /* Set the SDRAM Refresh Rate control register based on SSCLK value */
+ *pEBIU_SDRRC = mem_SDRRC;
+
+ /* SDRAM Memory Bank Control Register */
+ *pEBIU_SDBCTL = mem_SDBCTL;
+
+ /* SDRAM Memory Global Control Register */
+ *pEBIU_SDGCTL = mem_SDGCTL;
+ sync();
+ return mem_SDRRC;
+}
+
+#endif /* CONFIG_POST & CFG_POST_MEMORY */
+#endif /* CONFIG_POST */