2 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
3 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of authors nor the names of its contributors may be
15 * used to endorse or promote products derived from this software without
16 * specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/endian.h>
39 #include <sys/mutex.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
42 #include <sys/socket.h>
43 #include <sys/sysctl.h>
45 #include <sys/sockio.h>
47 #include <machine/bus.h>
49 #include <machine/resource.h>
51 #include <dev/ofw/ofw_bus.h>
52 #include <dev/ofw/ofw_bus_subr.h>
54 #include <arm/ti/ti_scm.h>
55 #include <arm/ti/ti_prcm.h>
57 #include <arm/ti/ti_edma3.h>
59 #define TI_EDMA3_NUM_TCS 3
60 #define TI_EDMA3_NUM_IRQS 3
61 #define TI_EDMA3_NUM_DMA_CHS 64
62 #define TI_EDMA3_NUM_QDMA_CHS 8
64 #define TI_EDMA3CC_PID 0x000
65 #define TI_EDMA3CC_DCHMAP(p) (0x100 + ((p)*4))
66 #define TI_EDMA3CC_DMAQNUM(n) (0x240 + ((n)*4))
67 #define TI_EDMA3CC_QDMAQNUM 0x260
68 #define TI_EDMA3CC_EMCR 0x308
69 #define TI_EDMA3CC_EMCRH 0x30C
70 #define TI_EDMA3CC_QEMCR 0x314
71 #define TI_EDMA3CC_CCERR 0x318
72 #define TI_EDMA3CC_CCERRCLR 0x31C
73 #define TI_EDMA3CC_DRAE(p) (0x340 + ((p)*8))
74 #define TI_EDMA3CC_DRAEH(p) (0x344 + ((p)*8))
75 #define TI_EDMA3CC_QRAE(p) (0x380 + ((p)*4))
76 #define TI_EDMA3CC_S_ESR(p) (0x2010 + ((p)*0x200))
77 #define TI_EDMA3CC_S_ESRH(p) (0x2014 + ((p)*0x200))
78 #define TI_EDMA3CC_S_SECR(p) (0x2040 + ((p)*0x200))
79 #define TI_EDMA3CC_S_SECRH(p) (0x2044 + ((p)*0x200))
80 #define TI_EDMA3CC_S_EESR(p) (0x2030 + ((p)*0x200))
81 #define TI_EDMA3CC_S_EESRH(p) (0x2034 + ((p)*0x200))
82 #define TI_EDMA3CC_S_IESR(p) (0x2060 + ((p)*0x200))
83 #define TI_EDMA3CC_S_IESRH(p) (0x2064 + ((p)*0x200))
84 #define TI_EDMA3CC_S_IPR(p) (0x2068 + ((p)*0x200))
85 #define TI_EDMA3CC_S_IPRH(p) (0x206C + ((p)*0x200))
86 #define TI_EDMA3CC_S_QEESR(p) (0x208C + ((p)*0x200))
88 #define TI_EDMA3CC_PARAM_OFFSET 0x4000
89 #define TI_EDMA3CC_OPT(p) (TI_EDMA3CC_PARAM_OFFSET + 0x0 + ((p)*0x20))
91 #define TI_EDMA3CC_DMAQNUM_SET(c,q) ((0x7 & (q)) << (((c) % 8) * 4))
92 #define TI_EDMA3CC_DMAQNUM_CLR(c) (~(0x7 << (((c) % 8) * 4)))
93 #define TI_EDMA3CC_QDMAQNUM_SET(c,q) ((0x7 & (q)) << ((c) * 4))
94 #define TI_EDMA3CC_QDMAQNUM_CLR(c) (~(0x7 << ((c) * 4)))
96 #define TI_EDMA3CC_OPT_TCC_CLR (~(0x3F000))
97 #define TI_EDMA3CC_OPT_TCC_SET(p) (((0x3F000 >> 12) & (p)) << 12)
99 struct ti_edma3_softc {
102 * We use one-element array in case if we need to add
103 * mem resources for transfer control windows
105 struct resource * mem_res[1];
106 struct resource * irq_res[TI_EDMA3_NUM_IRQS];
107 void *ih_cookie[TI_EDMA3_NUM_IRQS];
110 static struct ti_edma3_softc *ti_edma3_sc = NULL;
112 static struct resource_spec ti_edma3_mem_spec[] = {
113 { SYS_RES_MEMORY, 0, RF_ACTIVE },
116 static struct resource_spec ti_edma3_irq_spec[] = {
117 { SYS_RES_IRQ, 0, RF_ACTIVE },
118 { SYS_RES_IRQ, 1, RF_ACTIVE },
119 { SYS_RES_IRQ, 2, RF_ACTIVE },
123 /* Read/Write macros */
124 #define ti_edma3_cc_rd_4(reg) bus_read_4(ti_edma3_sc->mem_res[0], reg)
125 #define ti_edma3_cc_wr_4(reg, val) bus_write_4(ti_edma3_sc->mem_res[0], reg, val)
127 static void ti_edma3_intr_comp(void *arg);
128 static void ti_edma3_intr_mperr(void *arg);
129 static void ti_edma3_intr_err(void *arg);
132 driver_intr_t *handler;
134 } ti_edma3_intrs[TI_EDMA3_NUM_IRQS] = {
135 { ti_edma3_intr_comp, "EDMA Completion Interrupt" },
136 { ti_edma3_intr_mperr, "EDMA Memory Protection Error Interrupt" },
137 { ti_edma3_intr_err, "EDMA Error Interrupt" },
141 ti_edma3_probe(device_t dev)
144 if (!ofw_bus_status_okay(dev))
147 if (!ofw_bus_is_compatible(dev, "ti,edma3"))
150 device_set_desc(dev, "TI EDMA Controller");
155 ti_edma3_attach(device_t dev)
157 struct ti_edma3_softc *sc = device_get_softc(dev);
168 /* Request the memory resources */
169 err = bus_alloc_resources(dev, ti_edma3_mem_spec, sc->mem_res);
171 device_printf(dev, "Error: could not allocate mem resources\n");
175 /* Request the IRQ resources */
176 err = bus_alloc_resources(dev, ti_edma3_irq_spec, sc->irq_res);
178 device_printf(dev, "Error: could not allocate irq resources\n");
182 /* Enable Channel Controller */
183 ti_prcm_clk_enable(EDMA_TPCC_CLK);
185 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_PID);
187 device_printf(dev, "EDMA revision %08x\n", reg);
190 /* Attach interrupt handlers */
191 for (i = 0; i < TI_EDMA3_NUM_IRQS; ++i) {
192 err = bus_setup_intr(dev, sc->irq_res[i], INTR_TYPE_MISC |
193 INTR_MPSAFE, NULL, *ti_edma3_intrs[i].handler,
194 sc, &sc->ih_cookie[i]);
196 device_printf(dev, "could not setup %s\n",
197 ti_edma3_intrs[i].description);
205 static device_method_t ti_edma3_methods[] = {
206 DEVMETHOD(device_probe, ti_edma3_probe),
207 DEVMETHOD(device_attach, ti_edma3_attach),
211 static driver_t ti_edma3_driver = {
214 sizeof(struct ti_edma3_softc),
216 static devclass_t ti_edma3_devclass;
218 DRIVER_MODULE(ti_edma3, simplebus, ti_edma3_driver, ti_edma3_devclass, 0, 0);
219 MODULE_DEPEND(ti_edma3, ti_prcm, 1, 1, 1);
222 ti_edma3_intr_comp(void *arg)
224 printf("%s: unimplemented\n", __func__);
228 ti_edma3_intr_mperr(void *arg)
230 printf("%s: unimplemented\n", __func__);
234 ti_edma3_intr_err(void *arg)
236 printf("%s: unimplemented\n", __func__);
240 ti_edma3_init(unsigned int eqn)
245 /* on AM335x Event queue 0 is always mapped to Transfer Controller 0,
246 * event queue 1 to TC2, etc. So we are asking PRCM to power on specific
247 * TC based on what event queue we need to initialize */
248 ti_prcm_clk_enable(EDMA_TPTC0_CLK + eqn);
250 /* Clear Event Missed Regs */
251 ti_edma3_cc_wr_4(TI_EDMA3CC_EMCR, 0xFFFFFFFF);
252 ti_edma3_cc_wr_4(TI_EDMA3CC_EMCRH, 0xFFFFFFFF);
253 ti_edma3_cc_wr_4(TI_EDMA3CC_QEMCR, 0xFFFFFFFF);
255 /* Clear Error Reg */
256 ti_edma3_cc_wr_4(TI_EDMA3CC_CCERRCLR, 0xFFFFFFFF);
258 /* Enable DMA channels 0-63 */
259 ti_edma3_cc_wr_4(TI_EDMA3CC_DRAE(0), 0xFFFFFFFF);
260 ti_edma3_cc_wr_4(TI_EDMA3CC_DRAEH(0), 0xFFFFFFFF);
262 for (i = 0; i < 64; i++) {
263 ti_edma3_cc_wr_4(TI_EDMA3CC_DCHMAP(i), i<<5);
266 /* Initialize the DMA Queue Number Registers */
267 for (i = 0; i < TI_EDMA3_NUM_DMA_CHS; i++) {
268 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_DMAQNUM(i>>3));
269 reg &= TI_EDMA3CC_DMAQNUM_CLR(i);
270 reg |= TI_EDMA3CC_DMAQNUM_SET(i, eqn);
271 ti_edma3_cc_wr_4(TI_EDMA3CC_DMAQNUM(i>>3), reg);
274 /* Enable the QDMA Region access for all channels */
275 ti_edma3_cc_wr_4(TI_EDMA3CC_QRAE(0), (1 << TI_EDMA3_NUM_QDMA_CHS) - 1);
277 /*Initialize QDMA Queue Number Registers */
278 for (i = 0; i < TI_EDMA3_NUM_QDMA_CHS; i++) {
279 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_QDMAQNUM);
280 reg &= TI_EDMA3CC_QDMAQNUM_CLR(i);
281 reg |= TI_EDMA3CC_QDMAQNUM_SET(i, eqn);
282 ti_edma3_cc_wr_4(TI_EDMA3CC_QDMAQNUM, reg);
288 ti_edma3_enable_event_intr(unsigned int ch)
292 if (ch >= TI_EDMA3_NUM_DMA_CHS)
296 ti_edma3_cc_wr_4(TI_EDMA3CC_S_IESR(0), 1 << ch);
298 ti_edma3_cc_wr_4(TI_EDMA3CC_S_IESRH(0), 1 << (ch - 32));
305 ti_edma3_request_dma_ch(unsigned int ch, unsigned int tccn, unsigned int eqn)
309 if (ch >= TI_EDMA3_NUM_DMA_CHS)
312 /* Enable the DMA channel in the DRAE/DRAEH registers */
314 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_DRAE(0));
316 ti_edma3_cc_wr_4(TI_EDMA3CC_DRAE(0), reg);
318 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_DRAEH(0));
319 reg |= (0x01 << (ch - 32));
320 ti_edma3_cc_wr_4(TI_EDMA3CC_DRAEH(0), reg);
323 /* Associate DMA Channel to Event Queue */
324 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_DMAQNUM(ch >> 3));
325 reg &= TI_EDMA3CC_DMAQNUM_CLR(ch);
326 reg |= TI_EDMA3CC_DMAQNUM_SET((ch), eqn);
327 ti_edma3_cc_wr_4(TI_EDMA3CC_DMAQNUM(ch >> 3), reg);
329 /* Set TCC in corresponding PaRAM Entry */
330 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_OPT(ch));
331 reg &= TI_EDMA3CC_OPT_TCC_CLR;
332 reg |= TI_EDMA3CC_OPT_TCC_SET(ch);
333 ti_edma3_cc_wr_4(TI_EDMA3CC_OPT(ch), reg);
339 ti_edma3_request_qdma_ch(unsigned int ch, unsigned int tccn, unsigned int eqn)
343 if (ch >= TI_EDMA3_NUM_DMA_CHS)
346 /* Enable the QDMA channel in the QRAE registers */
347 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_QRAE(0));
349 ti_edma3_cc_wr_4(TI_EDMA3CC_QRAE(0), reg);
351 /* Associate QDMA Channel to Event Queue */
352 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_QDMAQNUM);
353 reg |= TI_EDMA3CC_QDMAQNUM_SET(ch, eqn);
354 ti_edma3_cc_wr_4(TI_EDMA3CC_QDMAQNUM, reg);
356 /* Set TCC in corresponding PaRAM Entry */
357 reg = ti_edma3_cc_rd_4(TI_EDMA3CC_OPT(ch));
358 reg &= TI_EDMA3CC_OPT_TCC_CLR;
359 reg |= TI_EDMA3CC_OPT_TCC_SET(ch);
360 ti_edma3_cc_wr_4(TI_EDMA3CC_OPT(ch), reg);
366 ti_edma3_enable_transfer_manual(unsigned int ch)
368 if (ch >= TI_EDMA3_NUM_DMA_CHS)
371 /* set corresponding bit in ESR/ESRH to set a event */
373 ti_edma3_cc_wr_4(TI_EDMA3CC_S_ESR(0), 1 << ch);
375 ti_edma3_cc_wr_4(TI_EDMA3CC_S_ESRH(0), 1 << (ch - 32));
382 ti_edma3_enable_transfer_qdma(unsigned int ch)
384 if (ch >= TI_EDMA3_NUM_QDMA_CHS)
387 /* set corresponding bit in QEESR to enable QDMA event */
388 ti_edma3_cc_wr_4(TI_EDMA3CC_S_QEESR(0), (1 << ch));
394 ti_edma3_enable_transfer_event(unsigned int ch)
396 if (ch >= TI_EDMA3_NUM_DMA_CHS)
399 /* Clear SECR(H) & EMCR(H) to clean any previous NULL request
400 * and set corresponding bit in EESR to enable DMA event */
402 ti_edma3_cc_wr_4(TI_EDMA3CC_S_SECR(0), (1 << ch));
403 ti_edma3_cc_wr_4(TI_EDMA3CC_EMCR, (1 << ch));
404 ti_edma3_cc_wr_4(TI_EDMA3CC_S_EESR(0), (1 << ch));
406 ti_edma3_cc_wr_4(TI_EDMA3CC_S_SECRH(0), 1 << (ch - 32));
407 ti_edma3_cc_wr_4(TI_EDMA3CC_EMCRH, 1 << (ch - 32));
408 ti_edma3_cc_wr_4(TI_EDMA3CC_S_EESRH(0), 1 << (ch - 32));
415 ti_edma3_param_write(unsigned int ch, struct ti_edma3cc_param_set *prs)
417 bus_write_region_4(ti_edma3_sc->mem_res[0], TI_EDMA3CC_OPT(ch),
418 (uint32_t *) prs, 8);
422 ti_edma3_param_read(unsigned int ch, struct ti_edma3cc_param_set *prs)
424 bus_read_region_4(ti_edma3_sc->mem_res[0], TI_EDMA3CC_OPT(ch),
425 (uint32_t *) prs, 8);