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29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
32 * \brief HSMCI driver implementation.
34 * \author Daniele Basile <asterix@develer.com>
38 #include "hsmci_sam3.h"
41 #include <drv/timer.h>
42 #include <drv/irq_cm3.h>
48 /** DMA Transfer Descriptor as well as Linked List Item */
49 typedef struct DmacDesc
51 uint32_t src_addr; /**< Source buffer address */
52 uint32_t dst_addr; /**< Destination buffer address */
53 uint32_t ctrl_a; /**< Control A register settings */
54 uint32_t ctrl_b; /**< Control B register settings */
55 uint32_t dsc_addr; /**< Next descriptor address */
58 #define HSMCI_CLK_DIV(RATE) ((CPU_FREQ / (RATE << 1)) - 1)
61 #define HSMCI_RESP_ERROR_MASK (BV(HSMCI_SR_RINDE) | BV(HSMCI_SR_RDIRE) \
62 | BV(HSMCI_SR_RENDE)| BV(HSMCI_SR_RTOE))
64 #define HSMCI_DATA_ERROR_MASK (BV(HSMCI_SR_DCRCE) | BV(HSMCI_SR_DTOE))
66 #define HSMCI_READY_MASK (BV(HSMCI_SR_CMDRDY) | BV(HSMCI_SR_NOTBUSY))
70 } while (!(HSMCI_SR & BV(HSMCI_SR_CMDRDY)))
73 #define HSMCI_WAIT_DATA_RDY()\
76 } while (!(HSMCI_SR & BV(HSMCI_SR_RXRDY)))
78 static DECLARE_ISR(hsmci_irq)
80 uint32_t status = HSMCI_SR;
81 if (status & BV(HSMCI_IER_DMADONE))
86 static DECLARE_ISR(dmac_irq)
88 uint32_t stat = DMAC_EBCISR;
90 if (stat & BV(DMAC_EBCISR_ERR3))
92 kprintf("err %08lx\n", stat);
96 void hsmci_readResp(uint32_t *resp, size_t len)
100 for (size_t i = 0; i < len ; i++)
101 resp[i] = HSMCI_RSPR;
104 bool hsmci_sendCmd(uint8_t index, uint32_t argument, uint32_t reply_type)
108 HSMCI_ARGR = argument;
109 HSMCI_CMDR = index | reply_type | BV(HSMCI_CMDR_MAXLAT);
111 uint32_t status = HSMCI_SR;
112 while (!(status & BV(HSMCI_SR_CMDRDY)))
114 if (status & HSMCI_RESP_ERROR_MASK)
125 INLINE void hsmci_setBlockSize(size_t blk_size)
127 HSMCI_DMA |= BV(HSMCI_DMA_DMAEN);
128 HSMCI_BLKR = blk_size << HSMCI_BLKR_BLKLEN_SHIFT;
131 void hsmci_prgTxDMA(const uint32_t *buf, size_t word_num, size_t blk_size)
134 hsmci_setBlockSize(blk_size);
136 DMAC_CHDR = BV(DMAC_CHDR_DIS0);
138 DMAC_SADDR0 = (uint32_t)buf;
139 DMAC_DADDR0 = (uint32_t)&HSMCI_TDR;
142 DMAC_CFG0 = BV(DMAC_CFG_DST_H2SEL) | DMAC_CFG_FIFOCFG_ALAP_CFG | (0x1 << DMAC_CFG_AHB_PROT_SHIFT);
143 DMAC_CTRLA0 = (word_num & DMAC_CTRLA_BTSIZE_MASK) |
144 DMAC_CTRLA_SRC_WIDTH_WORD | DMAC_CTRLA_DST_WIDTH_WORD;
145 DMAC_CTRLB0 = (BV(DMAC_CTRLB_SRC_DSCR) | BV(DMAC_CTRLB_DST_DSCR) | DMAC_CTRLB_FC_MEM2PER_DMA_FC |
146 DMAC_CTRLB_DST_INCR_FIXED | DMAC_CTRLB_SRC_INCR_INCREMENTING | BV(DMAC_CTRLB_IEN));
148 ASSERT(!(DMAC_CHSR & BV(DMAC_CHSR_ENA0)));
149 DMAC_CHER = BV(DMAC_CHER_ENA0);
153 void hsmci_prgRxDMA(uint32_t *buf, size_t word_num, size_t blk_size)
155 hsmci_setBlockSize(blk_size);
157 DMAC_CHDR = BV(DMAC_CHDR_DIS0);
159 DMAC_SADDR0 = (uint32_t)&HSMCI_RDR;
160 DMAC_DADDR0 = (uint32_t)buf;
163 DMAC_CFG0 = BV(DMAC_CFG_SRC_H2SEL) | DMAC_CFG_FIFOCFG_ALAP_CFG | (0x1 << DMAC_CFG_AHB_PROT_SHIFT);
164 DMAC_CTRLA0 = (word_num & DMAC_CTRLA_BTSIZE_MASK) |
165 DMAC_CTRLA_SRC_WIDTH_WORD | DMAC_CTRLA_DST_WIDTH_WORD;
166 DMAC_CTRLB0 = (BV(DMAC_CTRLB_SRC_DSCR) | BV(DMAC_CTRLB_DST_DSCR) | DMAC_CTRLB_FC_PER2MEM_DMA_FC |
167 DMAC_CTRLB_DST_INCR_INCREMENTING | DMAC_CTRLB_SRC_INCR_FIXED | BV(DMAC_CTRLB_IEN));
169 ASSERT(!(DMAC_CHSR & BV(DMAC_CHSR_ENA0)));
170 DMAC_CHER = BV(DMAC_CHER_ENA0);
174 void hsmci_waitTransfer(void)
176 while (!(HSMCI_SR & BV(HSMCI_SR_XFRDONE)))
180 void hsmci_setSpeed(uint32_t data_rate, int flag)
183 HSMCI_CFG |= BV(HSMCI_CFG_HSMODE);
185 HSMCI_CFG &= ~BV(HSMCI_CFG_HSMODE);
187 HSMCI_MR = HSMCI_CLK_DIV(data_rate) | ((0x7u << HSMCI_MR_PWSDIV_SHIFT) & HSMCI_MR_PWSDIV_MASK);
192 void hsmci_init(Hsmci *hsmci)
198 pmc_periphEnable(HSMCI_ID);
199 HSMCI_CR = BV(HSMCI_CR_SWRST);
200 HSMCI_CR = BV(HSMCI_CR_PWSDIS) | BV(HSMCI_CR_MCIDIS);
201 HSMCI_IDR = 0xFFFFFFFF;
203 HSMCI_DTOR = 0xFF | HSMCI_DTOR_DTOMUL_1048576;
204 HSMCI_CSTOR = 0xFF | HSMCI_CSTOR_CSTOMUL_1048576;
205 HSMCI_MR = HSMCI_CLK_DIV(HSMCI_INIT_SPEED) | ((0x7u << HSMCI_MR_PWSDIV_SHIFT) & HSMCI_MR_PWSDIV_MASK) | BV(HSMCI_MR_RDPROOF);
206 HSMCI_CFG = BV(HSMCI_CFG_FIFOMODE) | BV(HSMCI_CFG_FERRCTRL);
208 sysirq_setHandler(INT_HSMCI, hsmci_irq);
209 HSMCI_CR = BV(HSMCI_CR_MCIEN);
213 DMAC_EBCIDR = 0x3FFFFF;
216 pmc_periphEnable(DMAC_ID);
217 DMAC_EN = BV(DMAC_EN_ENABLE);
218 sysirq_setHandler(INT_DMAC, dmac_irq);
220 DMAC_EBCIER = BV(DMAC_EBCIER_BTC0) | BV(DMAC_EBCIER_ERR0);