2 * Driver for ATMEL DataFlash support
3 * Author : Hamid Ikdoumi (Atmel)
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 #ifndef CONFIG_AT91_LEGACY
24 #define CONFIG_AT91_LEGACY
25 #warning Please update to use C structur SoC access !
27 #include <asm/arch/hardware.h>
28 #include <asm/arch/clk.h>
29 #include <asm/arch/gpio.h>
30 #include <asm/arch/io.h>
31 #include <asm/arch/at91_pio.h>
32 #include <asm/arch/at91_spi.h>
34 #include <dataflash.h>
36 #define AT91_SPI_PCS0_DATAFLASH_CARD 0xE /* Chip Select 0: NPCS0%1110 */
37 #define AT91_SPI_PCS1_DATAFLASH_CARD 0xD /* Chip Select 1: NPCS1%1101 */
38 #define AT91_SPI_PCS2_DATAFLASH_CARD 0xB /* Chip Select 2: NPCS2%1011 */
39 #define AT91_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3: NPCS3%0111 */
41 void AT91F_SpiInit(void)
44 writel(AT91_SPI_SWRST, AT91_BASE_SPI + AT91_SPI_CR);
46 /* Configure SPI in Master Mode with No CS selected !!! */
47 writel(AT91_SPI_MSTR | AT91_SPI_MODFDIS | AT91_SPI_PCS,
48 AT91_BASE_SPI + AT91_SPI_MR);
51 writel(AT91_SPI_NCPHA |
52 (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
53 (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
54 ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
55 AT91_BASE_SPI + AT91_SPI_CSR(0));
57 #ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS1
59 writel(AT91_SPI_NCPHA |
60 (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
61 (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
62 ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
63 AT91_BASE_SPI + AT91_SPI_CSR(1));
65 #ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS2
67 writel(AT91_SPI_NCPHA |
68 (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
69 (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
70 ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
71 AT91_BASE_SPI + AT91_SPI_CSR(2));
73 #ifdef CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3
75 writel(AT91_SPI_NCPHA |
76 (AT91_SPI_DLYBS & DATAFLASH_TCSS) |
77 (AT91_SPI_DLYBCT & DATAFLASH_TCHS) |
78 ((get_mck_clk_rate() / AT91_SPI_CLK) << 8),
79 AT91_BASE_SPI + AT91_SPI_CSR(3));
83 writel(AT91_SPI_SPIEN, AT91_BASE_SPI + AT91_SPI_CR);
85 while (!(readl(AT91_BASE_SPI + AT91_SPI_SR) & AT91_SPI_SPIENS));
88 * Add tempo to get SPI in a safe state.
89 * Should not be needed for new silicon (Rev B)
92 readl(AT91_BASE_SPI + AT91_SPI_SR);
93 readl(AT91_BASE_SPI + AT91_SPI_RDR);
97 void AT91F_SpiEnable(int cs)
102 case 0: /* Configure SPI CS0 for Serial DataFlash AT45DBxx */
103 mode = readl(AT91_BASE_SPI + AT91_SPI_MR);
105 writel(mode | ((AT91_SPI_PCS0_DATAFLASH_CARD<<16) & AT91_SPI_PCS),
106 AT91_BASE_SPI + AT91_SPI_MR);
108 case 1: /* Configure SPI CS1 for Serial DataFlash AT45DBxx */
109 mode = readl(AT91_BASE_SPI + AT91_SPI_MR);
111 writel(mode | ((AT91_SPI_PCS1_DATAFLASH_CARD<<16) & AT91_SPI_PCS),
112 AT91_BASE_SPI + AT91_SPI_MR);
114 case 2: /* Configure SPI CS2 for Serial DataFlash AT45DBxx */
115 mode = readl(AT91_BASE_SPI + AT91_SPI_MR);
117 writel(mode | ((AT91_SPI_PCS2_DATAFLASH_CARD<<16) & AT91_SPI_PCS),
118 AT91_BASE_SPI + AT91_SPI_MR);
121 mode = readl(AT91_BASE_SPI + AT91_SPI_MR);
123 writel(mode | ((AT91_SPI_PCS3_DATAFLASH_CARD<<16) & AT91_SPI_PCS),
124 AT91_BASE_SPI + AT91_SPI_MR);
129 writel(AT91_SPI_SPIEN, AT91_BASE_SPI + AT91_SPI_CR);
132 unsigned int AT91F_SpiWrite1(AT91PS_DataflashDesc pDesc);
134 unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc)
136 unsigned int timeout;
140 writel(AT91_SPI_TXTDIS + AT91_SPI_RXTDIS, AT91_BASE_SPI + AT91_SPI_PTCR);
142 /* Initialize the Transmit and Receive Pointer */
143 writel((unsigned int)pDesc->rx_cmd_pt, AT91_BASE_SPI + AT91_SPI_RPR);
144 writel((unsigned int)pDesc->tx_cmd_pt, AT91_BASE_SPI + AT91_SPI_TPR);
146 /* Intialize the Transmit and Receive Counters */
147 writel(pDesc->rx_cmd_size, AT91_BASE_SPI + AT91_SPI_RCR);
148 writel(pDesc->tx_cmd_size, AT91_BASE_SPI + AT91_SPI_TCR);
150 if (pDesc->tx_data_size != 0) {
151 /* Initialize the Next Transmit and Next Receive Pointer */
152 writel((unsigned int)pDesc->rx_data_pt, AT91_BASE_SPI + AT91_SPI_RNPR);
153 writel((unsigned int)pDesc->tx_data_pt, AT91_BASE_SPI + AT91_SPI_TNPR);
155 /* Intialize the Next Transmit and Next Receive Counters */
156 writel(pDesc->rx_data_size, AT91_BASE_SPI + AT91_SPI_RNCR);
157 writel(pDesc->tx_data_size, AT91_BASE_SPI + AT91_SPI_TNCR);
160 /* arm simple, non interrupt dependent timer */
161 reset_timer_masked();
164 writel(AT91_SPI_TXTEN + AT91_SPI_RXTEN, AT91_BASE_SPI + AT91_SPI_PTCR);
165 while (!(readl(AT91_BASE_SPI + AT91_SPI_SR) & AT91_SPI_RXBUFF) &&
166 ((timeout = get_timer_masked()) < CONFIG_SYS_SPI_WRITE_TOUT));
167 writel(AT91_SPI_TXTDIS + AT91_SPI_RXTDIS, AT91_BASE_SPI + AT91_SPI_PTCR);
170 if (timeout >= CONFIG_SYS_SPI_WRITE_TOUT) {
171 printf("Error Timeout\n\r");
172 return DATAFLASH_ERROR;