1 /*-
51  * Optimize FIFO reads and writes to do word-at-a-time instead of byte-at-a-time
105 #define	FSL_ESPI_WRITE(sc,off,val)	bus_write_4(sc->sc_mem_res, off, val)
106 #define	FSL_ESPI_READ(sc,off)		bus_read_4(sc->sc_mem_res, off)
107 #define	FSL_ESPI_WRITE_FIFO(sc,off,val)	bus_write_1(sc->sc_mem_res, off, val)
108 #define	FSL_ESPI_READ_FIFO(sc,off)	bus_read_1(sc->sc_mem_res, off)
111     mtx_lock(&(_sc)->sc_mtx)
113     mtx_unlock(&(_sc)->sc_mtx)
140 	if (!ofw_bus_is_compatible(dev, "fsl,mpc8536-espi"))  in fsl_espi_probe()
143 	device_set_desc(dev, "Freescale eSPI controller");  in fsl_espi_probe()
156 	sc->sc_dev = dev;  in fsl_espi_attach()
160 	sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,  in fsl_espi_attach()
162 	if (!sc->sc_mem_res) {  in fsl_espi_attach()
168 	sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,  in fsl_espi_attach()
170 	if (!sc->sc_irq_res) {  in fsl_espi_attach()
171 		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);  in fsl_espi_attach()
177 	if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE,  in fsl_espi_attach()
178 	    NULL, fsl_espi_intr, sc, &sc->sc_intrhand)) {  in fsl_espi_attach()
179 		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);  in fsl_espi_attach()
180 		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);  in fsl_espi_attach()
184 	if (OF_getencprop(node, "fsl,espi-num-chipselects",  in fsl_espi_attach()
185 	    &sc->sc_num_cs, sizeof(sc->sc_num_cs)) < 0 )  in fsl_espi_attach()
186 		sc->sc_num_cs = 4;  in fsl_espi_attach()
188 	mtx_init(&sc->sc_mtx, "fsl_espi", NULL, MTX_DEF);  in fsl_espi_attach()
213 	mtx_destroy(&sc->sc_mtx);  in fsl_espi_detach()
214 	if (sc->sc_intrhand)  in fsl_espi_detach()
215 		bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intrhand);  in fsl_espi_detach()
216 	if (sc->sc_irq_res)  in fsl_espi_detach()
217 		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);  in fsl_espi_detach()
218 	if (sc->sc_mem_res)  in fsl_espi_detach()
219 		bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);  in fsl_espi_detach()
231 	cmd = sc->sc_cmd;  in fsl_espi_fill_fifo()
233 	while (sc->sc_written < sc->sc_len &&  in fsl_espi_fill_fifo()
235 		data = (uint8_t *)cmd->tx_cmd;  in fsl_espi_fill_fifo()
236 		written = sc->sc_written++;  in fsl_espi_fill_fifo()
237 		if (written >= cmd->tx_cmd_sz) {  in fsl_espi_fill_fifo()
238 			data = (uint8_t *)cmd->tx_data;  in fsl_espi_fill_fifo()
239 			written -= cmd->tx_cmd_sz;  in fsl_espi_fill_fifo()
254 	cmd = sc->sc_cmd;  in fsl_espi_drain_fifo()
256 	while (sc->sc_read < sc->sc_len && (spier & ESPI_SPIE_RNE)) {  in fsl_espi_drain_fifo()
257 		data = (uint8_t *)cmd->rx_cmd;  in fsl_espi_drain_fifo()
258 		read = sc->sc_read++;  in fsl_espi_drain_fifo()
259 		if (read >= cmd->rx_cmd_sz) {  in fsl_espi_drain_fifo()
260 			data = (uint8_t *)cmd->rx_data;  in fsl_espi_drain_fifo()
261 			read -= cmd->rx_cmd_sz;  in fsl_espi_drain_fifo()
279 	if ((sc->sc_flags & FSL_ESPI_BUSY) == 0) {  in fsl_espi_intr()
286 	/* TX - Fill up the FIFO. */  in fsl_espi_intr()
289 	/* RX - Drain the FIFO. */  in fsl_espi_intr()
294 		wakeup(sc->sc_dev);  in fsl_espi_intr()
309 	KASSERT(cmd->tx_cmd_sz == cmd->rx_cmd_sz,   in fsl_espi_transfer()
311 	KASSERT(cmd->tx_data_sz == cmd->rx_data_sz,   in fsl_espi_transfer()
315 	if (cmd->tx_cmd_sz + cmd->tx_data_sz > ESPI_SPCOM_TRANLEN_M + 1) {  in fsl_espi_transfer()
321 	if (cs < 0 || cs > sc->sc_num_cs) {  in fsl_espi_transfer()
333 	while (sc->sc_flags & FSL_ESPI_BUSY)  in fsl_espi_transfer()
334 		mtx_sleep(dev, &sc->sc_mtx, 0, "fsl_espi", 0);  in fsl_espi_transfer()
337 	sc->sc_flags = FSL_ESPI_BUSY;  in fsl_espi_transfer()
340 	sc->sc_cmd = cmd;  in fsl_espi_transfer()
341 	sc->sc_read = 0;  in fsl_espi_transfer()
342 	sc->sc_written = 0;  in fsl_espi_transfer()
343 	sc->sc_len = cmd->tx_cmd_sz + cmd->tx_data_sz;  in fsl_espi_transfer()
357 	pm = howmany(plat_clk, spi_clk * 2) - 1;  in fsl_espi_transfer()
371 	csmode |= ESPI_CSMODE_LEN(7);/* Only deal with 8-bit characters. */  in fsl_espi_transfer()
374 	FSL_ESPI_WRITE(sc, ESPI_SPCOM, (cs << ESPI_SPCOM_CS_S) | (sc->sc_len - 1));  in fsl_espi_transfer()
381 	err = mtx_sleep(dev, &sc->sc_mtx, 0, "fsl_espi", hz * 2);  in fsl_espi_transfer()
385 	sc->sc_flags = 0;  in fsl_espi_transfer()
394 		device_printf(sc->sc_dev, "SPI error\n");  in fsl_espi_transfer()