2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
3 * Copyright (c) 2011, Aleksandr Rybalko <ray@FreeBSD.org>
4 * Copyright (c) 2013, Alexander A. Mityaev <sansan@adm.ua>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
41 #include <sys/mutex.h>
43 #include <machine/bus.h>
44 #include <machine/cpu.h>
45 //#include <machine/pmap.h>
47 #include <dev/spibus/spi.h>
48 #include <dev/spibus/spibusvar.h>
49 #include "spibus_if.h"
51 #include "opt_platform.h"
53 #include <dev/ofw/openfirm.h>
54 #include <dev/ofw/ofw_bus.h>
55 #include <dev/ofw/ofw_bus_subr.h>
57 #include <mips/mediatek/mtk_spi_v1.h>
58 #include <dev/flash/mx25lreg.h>
62 #define dprintf printf
64 #define dprintf(x, arg...)
68 * register space access macros
70 #define SPI_WRITE(sc, reg, val) do { \
71 bus_write_4(sc->sc_mem_res, (reg), (val)); \
74 #define SPI_READ(sc, reg) bus_read_4(sc->sc_mem_res, (reg))
76 #define SPI_SET_BITS(sc, reg, bits) \
77 SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) | (bits))
79 #define SPI_CLEAR_BITS(sc, reg, bits) \
80 SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) & ~(bits))
82 struct mtk_spi_softc {
84 struct resource *sc_mem_res;
87 static int mtk_spi_probe(device_t);
88 static int mtk_spi_attach(device_t);
89 static int mtk_spi_detach(device_t);
90 static int mtk_spi_wait(struct mtk_spi_softc *);
91 static void mtk_spi_chip_activate(struct mtk_spi_softc *);
92 static void mtk_spi_chip_deactivate(struct mtk_spi_softc *);
93 static uint8_t mtk_spi_txrx(struct mtk_spi_softc *, uint8_t *, int);
94 static int mtk_spi_transfer(device_t, device_t, struct spi_command *);
95 static phandle_t mtk_spi_get_node(device_t, device_t);
97 static struct ofw_compat_data compat_data[] = {
98 { "ralink,rt2880-spi", 1 },
99 { "ralink,rt3050-spi", 1 },
100 { "ralink,rt3352-spi", 1 },
101 { "ralink,rt3883-spi", 1 },
102 { "ralink,rt5350-spi", 1 },
103 { "ralink,mt7620a-spi", 1 },
108 mtk_spi_probe(device_t dev)
111 if (!ofw_bus_status_okay(dev))
114 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
117 device_set_desc(dev, "MTK SPI Controller (v1)");
123 mtk_spi_attach(device_t dev)
125 struct mtk_spi_softc *sc = device_get_softc(dev);
130 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
132 if (!sc->sc_mem_res) {
133 device_printf(dev, "Could not map memory\n");
137 if (mtk_spi_wait(sc)) {
138 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
142 SPI_WRITE(sc, MTK_SPICFG, MSBFIRST | SPICLKPOL | TX_ON_CLK_FALL |
143 SPI_CLK_DIV8); /* XXX: make it configurable */
145 * W25Q64CV max 104MHz, bus 120-192 MHz, so divide by 2.
146 * Update: divide by 4, DEV2 to fast for flash.
149 device_add_child(dev, "spibus", 0);
150 return (bus_generic_attach(dev));
154 mtk_spi_detach(device_t dev)
156 struct mtk_spi_softc *sc = device_get_softc(dev);
158 SPI_SET_BITS(sc, MTK_SPICTL, HIZSMOSI | CS_HIGH);
161 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
167 mtk_spi_chip_activate(struct mtk_spi_softc *sc)
169 // printf("%s\n", __func__);
174 SPI_CLEAR_BITS(sc, MTK_SPICTL, CS_HIGH | HIZSMOSI);
178 mtk_spi_chip_deactivate(struct mtk_spi_softc *sc)
180 // printf("%s\n", __func__);
183 * Put all CSx to high
185 SPI_SET_BITS(sc, MTK_SPICTL, CS_HIGH | HIZSMOSI);
189 mtk_spi_wait(struct mtk_spi_softc *sc)
194 if (!SPI_READ(sc, MTK_SPIBUSY))
206 mtk_spi_txrx(struct mtk_spi_softc *sc, uint8_t *data, int write)
209 if (mtk_spi_wait(sc))
212 if (write == MTK_SPI_WRITE) {
213 SPI_WRITE(sc, MTK_SPIDATA, *data);
214 SPI_SET_BITS(sc, MTK_SPICTL, START_WRITE);
215 //printf("%s(W:%d)\n", __func__, *data);
216 } else {/* MTK_SPI_READ */
217 SPI_SET_BITS(sc, MTK_SPICTL, START_READ);
218 if (mtk_spi_wait(sc))
221 *data = SPI_READ(sc, MTK_SPIDATA) & 0xff;
222 //printf("%s(R:%d)\n", __func__, *data);
228 mtk_spi_transfer(device_t dev, device_t child, struct spi_command *cmd)
230 struct mtk_spi_softc *sc;
231 uint8_t *buf, byte, *tx_buf;
232 struct spibus_ivar *devi = SPIBUS_IVAR(child);
233 int i, sz, error = 0, write = 0;
235 sc = device_get_softc(dev);
241 /* There is always a command to transfer. */
242 tx_buf = (uint8_t *)(cmd->tx_cmd);
244 /* Perform some fixup because MTK dont support duplex SPI */
250 case CMD_ENTER_4B_MODE:
251 case CMD_EXIT_4B_MODE:
252 case CMD_WRITE_ENABLE:
253 case CMD_WRITE_DISABLE:
257 case CMD_READ_STATUS:
263 cmd->rx_cmd_sz = cmd->tx_data_sz = 0;
265 case CMD_SECTOR_ERASE:
268 case CMD_PAGE_PROGRAM:
269 cmd->rx_cmd_sz = cmd->rx_data_sz = 0;
273 mtk_spi_chip_activate(sc);
275 if (cmd->tx_cmd_sz + cmd->rx_cmd_sz) {
276 buf = (uint8_t *)(cmd->rx_cmd);
277 tx_buf = (uint8_t *)(cmd->tx_cmd);
278 sz = cmd->tx_cmd_sz + cmd->rx_cmd_sz;
280 for (i = 0; i < sz; i++) {
281 if(i < cmd->tx_cmd_sz) {
283 error = mtk_spi_txrx(sc, &byte,
286 goto mtk_spi_transfer_fail;
289 error = mtk_spi_txrx(sc, &byte,
292 goto mtk_spi_transfer_fail;
298 * Transfer/Receive data
301 if (cmd->tx_data_sz + cmd->rx_data_sz) {
302 write = (cmd->tx_data_sz > 0)?1:0;
303 buf = (uint8_t *)(write ? cmd->tx_data : cmd->rx_data);
304 sz = write ? cmd->tx_data_sz : cmd->rx_data_sz;
306 for (i = 0; i < sz; i++) {
308 error = mtk_spi_txrx(sc, &byte,
309 write ? MTK_SPI_WRITE : MTK_SPI_READ);
311 goto mtk_spi_transfer_fail;
315 mtk_spi_transfer_fail:
316 mtk_spi_chip_deactivate(sc);
322 mtk_spi_get_node(device_t bus, device_t dev)
325 /* We only have one child, the SPI bus, which needs our own node. */
326 return (ofw_bus_get_node(bus));
329 static device_method_t mtk_spi_methods[] = {
330 /* Device interface */
331 DEVMETHOD(device_probe, mtk_spi_probe),
332 DEVMETHOD(device_attach, mtk_spi_attach),
333 DEVMETHOD(device_detach, mtk_spi_detach),
335 DEVMETHOD(spibus_transfer, mtk_spi_transfer),
337 /* ofw_bus interface */
338 DEVMETHOD(ofw_bus_get_node, mtk_spi_get_node),
343 static driver_t mtk_spi_driver = {
345 .methods = mtk_spi_methods,
346 .size = sizeof(struct mtk_spi_softc),
349 static devclass_t mtk_spi_devclass;
351 DRIVER_MODULE(mtk_spi_v1, simplebus, mtk_spi_driver, mtk_spi_devclass, 0, 0);