4  * Copyright 2010-2011 Freescale Semiconductor, Inc.
7  * SPDX-License-Identifier:	GPL-2.0+
43 #define ESPI_MODE_TXTHR(x)	((x) << 8)	/* Tx FIFO threshold */  argument
44 #define ESPI_MODE_RXTHR(x)	((x) << 0)	/* Rx FIFO threshold */  argument
46 #define ESPI_COM_CS(x)		((x) << 30)  argument
47 #define ESPI_COM_TRANLEN(x)	((x) << 0)  argument
53 #define ESPI_CSMODE_PM(x)		((x) << 24)  argument
55 #define ESPI_CSMODE_LEN(x)		((x) << 16)  argument
56 #define ESPI_CSMODE_CSBEF(x)		((x) << 12)  argument
57 #define ESPI_CSMODE_CSAFT(x)		((x) << 8)  argument
58 #define ESPI_CSMODE_CSCG(x)		((x) << 3)  argument
66 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,  in spi_setup_slave()  argument
75 	if (!spi_cs_is_valid(bus, cs))  in spi_setup_slave()
78 	fsl = spi_alloc_slave(struct fsl_spi_slave, bus, cs);  in spi_setup_slave()
82 	fsl->espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);  in spi_setup_slave()
83 	fsl->mode = mode;  in spi_setup_slave()
84 	fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;  in spi_setup_slave()
89 	fsl->div16 = 0;  in spi_setup_slave()
91 		fsl->div16 = ESPI_CSMODE_DIV16;  in spi_setup_slave()
101 		pm--;  in spi_setup_slave()
102 	fsl->pm = pm;  in spi_setup_slave()
104 	if (fsl->div16)  in spi_setup_slave()
110 	fsl->tx_timeout = DIV_ROUND_UP((US_PER_SECOND * ESPI_FIFO_WIDTH_BIT  in spi_setup_slave()
113 	return &fsl->slave;  in spi_setup_slave()
130 	ccsr_espi_t *espi = fsl->espi;  in spi_claim_bus()
131 	unsigned char pm = fsl->pm;  in spi_claim_bus()
132 	unsigned int cs = slave->cs;  in spi_claim_bus()  local
133 	unsigned int mode =  fsl->mode;  in spi_claim_bus()
134 	unsigned int div16 = fsl->div16;  in spi_claim_bus()
137 	debug("%s: bus:%i cs:%i\n", __func__, slave->bus, cs);  in spi_claim_bus()
140 	out_be32(&espi->mode, ESPI_MODE_RXTHR(3)  in spi_claim_bus()
143 	out_be32(&espi->event, 0xffffffff); /* Clear all eSPI events */  in spi_claim_bus()
144 	out_be32(&espi->mask, 0x00000000); /* Mask  all eSPI interrupts */  in spi_claim_bus()
146 	/* Init CS mode interface */  in spi_claim_bus()
148 		out_be32(&espi->csmode[i], ESPI_CSMODE_INIT_VAL);  in spi_claim_bus()
150 	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs]) &  in spi_claim_bus()
156 	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])  in spi_claim_bus()
161 		out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])  in spi_claim_bus()
164 		out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])  in spi_claim_bus()
168 	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])  in spi_claim_bus()
172 	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])  in spi_claim_bus()
185 	ccsr_espi_t *espi = fsl->espi;  in fsl_espi_tx()
194 	out_be32(&espi->tx, tmpdout);  in fsl_espi_tx()
195 	out_be32(&espi->event, ESPI_EV_TNF);  in fsl_espi_tx()
196 	debug("***spi_xfer:...%08x written\n", tmpdout);  in fsl_espi_tx()
198 	tmp_tx_timeout = fsl->tx_timeout;  in fsl_espi_tx()
200 	while (tmp_tx_timeout--) {  in fsl_espi_tx()
201 		event = in_be32(&espi->event);  in fsl_espi_tx()
203 			out_be32(&espi->event, ESPI_EV_TXE);  in fsl_espi_tx()
210 		debug("***spi_xfer:...Tx timeout! event = %08x\n", event);  in fsl_espi_tx()
215 	ccsr_espi_t *espi = fsl->espi;  in fsl_espi_rx()
226 		return -1;  in fsl_espi_rx()
229 	while (rx_times--) {  in fsl_espi_rx()
230 		tmpdin = in_be32(&espi->rx);  in fsl_espi_rx()
231 		debug("***spi_xfer:...%08x readed\n", tmpdin);  in fsl_espi_rx()
240 	out_be32(&espi->event, ESPI_EV_RNE);  in fsl_espi_rx()
249 	ccsr_espi_t *espi = fsl->espi;  in spi_xfer()
258 	u8 *cmd_buf = fsl->cmd_buf;  in spi_xfer()
259 	size_t cmd_len = fsl->cmd_len;  in spi_xfer()
264 	max_tran_len = fsl->max_transfer_length;  in spi_xfer()
267 		cmd_len = fsl->cmd_len = data_len;  in spi_xfer()
301 	debug("spi_xfer: data_out %08X(%p) data_in %08X(%p) len %u\n",  in spi_xfer()
305 	while (num_chunks--) {  in spi_xfer()
312 		fsl->data_len = tran_len + cmd_len;  in spi_xfer()
316 		out_be32(&espi->event , 0xffffffff);  in spi_xfer()
317 		/* handle data in 32-bit chunks */  in spi_xfer()
319 			event = in_be32(&espi->event);  in spi_xfer()
324 					len -= 4;  in spi_xfer()
329 			event = in_be32(&espi->event);  in spi_xfer()
341 					num_blks--;  in spi_xfer()
352 				data_len -= tran_len;  in spi_xfer()
363 int spi_cs_is_valid(unsigned int bus, unsigned int cs)  in spi_cs_is_valid()  argument
365 	return bus == 0 && cs < ESPI_MAX_CS_NUM;  in spi_cs_is_valid()
371 	ccsr_espi_t *espi = fsl->espi;  in spi_cs_activate()
373 	size_t data_len = fsl->data_len;  in spi_cs_activate()
376 	com |= ESPI_COM_CS(slave->cs);  in spi_cs_activate()
377 	com |= ESPI_COM_TRANLEN(data_len - 1);  in spi_cs_activate()
378 	out_be32(&espi->com, com);  in spi_cs_activate()
384 	ccsr_espi_t *espi = fsl->espi;  in spi_cs_deactivate()
387 	out_be32(&espi->mode, in_be32(&espi->mode) & (~ESPI_MODE_EN));  in spi_cs_deactivate()
388 	out_be32(&espi->mode, in_be32(&espi->mode) | ESPI_MODE_EN);  in spi_cs_deactivate()