--- /dev/null
+/*
+ * Driver for ATMEL DataFlash support
+ * Author : Hamid Ikdoumi (Atmel)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * This driver desperately needs rework:
+ *
+ * - use structure SoC access
+ * - get rid of including asm/arch/at91_spi.h
+ * - remove asm/arch/at91_spi.h
+ * - get rid of all CONFIG_ATMEL_LEGACY defines and uses
+ *
+ * 02-Aug-2010 Reinhard Meyer <uboot@emk-elektronik.de>
+ */
+
+#include <common.h>
+#ifndef CONFIG_ATMEL_LEGACY
+# define CONFIG_ATMEL_LEGACY
+#endif
+#include <spi.h>
+#include <malloc.h>
+
+#include <asm/io.h>
+
+#include <asm/arch/clk.h>
+#include <asm/arch/hardware.h>
+
+#include "atmel_spi.h"
+
+#include <asm/arch/gpio.h>
+#include <asm/arch/at91_pio.h>
+#include <asm/arch/at91_spi.h>
+
+#include <dataflash.h>
+
+#define AT91_SPI_PCS0_DATAFLASH_CARD 0xE /* Chip Select 0: NPCS0%1110 */
+#define AT91_SPI_PCS1_DATAFLASH_CARD 0xD /* Chip Select 1: NPCS1%1101 */
+#define AT91_SPI_PCS2_DATAFLASH_CARD 0xB /* Chip Select 2: NPCS2%1011 */
+#define AT91_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3: NPCS3%0111 */
+
+void AT91F_SpiInit(void)
+{
+ /* Reset the SPI */
+ writel(AT91_SPI_SWRST, ATMEL_BASE_SPI0 + AT91_SPI_CR);
+
+ /* Configure SPI in Master Mode with No CS selected !!! */
+ writel(AT91_SPI_MSTR | AT91_SPI_MODFDIS | AT91_SPI_PCS,
+ ATMEL_BASE_SPI0 + AT91_SPI_MR);
+
+ /* Configure CS0 */
+ writel(AT91_SPI_NCPHA |
+ (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
+ (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
+ ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
+ ATMEL_BASE_SPI0 + AT91_SPI_CSR(0));
+
+#ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS1
+ /* Configure CS1 */
+ writel(AT91_SPI_NCPHA |
+ (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
+ (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
+ ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
+ ATMEL_BASE_SPI0 + AT91_SPI_CSR(1));
+#endif
+#ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS2
+ /* Configure CS2 */
+ writel(AT91_SPI_NCPHA |
+ (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
+ (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
+ ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
+ ATMEL_BASE_SPI0 + AT91_SPI_CSR(2));
+#endif
+#ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3
+ /* Configure CS3 */
+ writel(AT91_SPI_NCPHA |
+ (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
+ (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
+ ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
+ ATMEL_BASE_SPI0 + AT91_SPI_CSR(3));
+#endif
+
+ /* SPI_Enable */
+ writel(AT91_SPI_SPIEN, ATMEL_BASE_SPI0 + AT91_SPI_CR);
+
+ while (!(readl(ATMEL_BASE_SPI0 + AT91_SPI_SR) & AT91_SPI_SPIENS))
+ ;
+
+ /*
+ * Add tempo to get SPI in a safe state.
+ * Should not be needed for new silicon (Rev B)
+ */
+ udelay(500000);
+ readl(ATMEL_BASE_SPI0 + AT91_SPI_SR);
+ readl(ATMEL_BASE_SPI0 + AT91_SPI_RDR);
+
+}
+
+void AT91F_SpiEnable(int cs)
+{
+ unsigned long mode;
+
+ mode = readl(ATMEL_BASE_SPI0 + AT91_SPI_MR);
+ mode &= ~AT91_SPI_PCS;
+
+ switch (cs) {
+ case 0:
+ mode |= AT91_SPI_PCS0_DATAFLASH_CARD << 16;
+ break;
+ case 1:
+ mode |= AT91_SPI_PCS1_DATAFLASH_CARD << 16;
+ break;
+ case 2:
+ mode |= AT91_SPI_PCS2_DATAFLASH_CARD << 16;
+ break;
+ case 3:
+ mode |= AT91_SPI_PCS3_DATAFLASH_CARD << 16;
+ break;
+ }
+
+ writel(mode, ATMEL_BASE_SPI0 + AT91_SPI_MR);
+
+ /* SPI_Enable */
+ writel(AT91_SPI_SPIEN, ATMEL_BASE_SPI0 + AT91_SPI_CR);
+}
+
+unsigned int AT91F_SpiWrite1(AT91PS_DataflashDesc pDesc);
+
+unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc)
+{
+ unsigned int timeout;
+ unsigned int timebase;
+
+ pDesc->state = BUSY;
+
+ writel(AT91_SPI_TXTDIS + AT91_SPI_RXTDIS,
+ ATMEL_BASE_SPI0 + AT91_SPI_PTCR);
+
+ /* Initialize the Transmit and Receive Pointer */
+ writel((unsigned int)pDesc->rx_cmd_pt,
+ ATMEL_BASE_SPI0 + AT91_SPI_RPR);
+ writel((unsigned int)pDesc->tx_cmd_pt,
+ ATMEL_BASE_SPI0 + AT91_SPI_TPR);
+
+ /* Intialize the Transmit and Receive Counters */
+ writel(pDesc->rx_cmd_size, ATMEL_BASE_SPI0 + AT91_SPI_RCR);
+ writel(pDesc->tx_cmd_size, ATMEL_BASE_SPI0 + AT91_SPI_TCR);
+
+ if (pDesc->tx_data_size != 0) {
+ /* Initialize the Next Transmit and Next Receive Pointer */
+ writel((unsigned int)pDesc->rx_data_pt,
+ ATMEL_BASE_SPI0 + AT91_SPI_RNPR);
+ writel((unsigned int)pDesc->tx_data_pt,
+ ATMEL_BASE_SPI0 + AT91_SPI_TNPR);
+
+ /* Intialize the Next Transmit and Next Receive Counters */
+ writel(pDesc->rx_data_size,
+ ATMEL_BASE_SPI0 + AT91_SPI_RNCR);
+ writel(pDesc->tx_data_size,
+ ATMEL_BASE_SPI0 + AT91_SPI_TNCR);
+ }
+
+ /* arm simple, non interrupt dependent timer */
+ timebase = get_timer(0);
+ timeout = 0;
+
+ writel(AT91_SPI_TXTEN + AT91_SPI_RXTEN,
+ ATMEL_BASE_SPI0 + AT91_SPI_PTCR);
+ while (!(readl(ATMEL_BASE_SPI0 + AT91_SPI_SR) & AT91_SPI_RXBUFF) &&
+ ((timeout = get_timer(timebase)) < CONFIG_SYS_SPI_WRITE_TOUT))
+ ;
+ writel(AT91_SPI_TXTDIS + AT91_SPI_RXTDIS,
+ ATMEL_BASE_SPI0 + AT91_SPI_PTCR);
+ pDesc->state = IDLE;
+
+ if (timeout >= CONFIG_SYS_SPI_WRITE_TOUT) {
+ printf("Error Timeout\n\r");
+ return DATAFLASH_ERROR;
+ }
+
+ return DATAFLASH_OK;
+}
Code Review / kvmfornfv.git / blobdiff