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/*
* Copyright 2007 OpenMoko, Inc.
* Copyright © 2009 Lars-Peter Clausen <lars@metafoo.de>
*
* This driver is based on Xati,
* Copyright 2004 Eric Anholt
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "glamo-log.h"
#include "glamo.h"
#include "glamo-regs.h"
#include "glamo-cmdq.h"
#include "glamo-engine.h"
static void
GLAMOCMDQResetCP(GlamoPtr pGlamo);
#define CQ_LEN 255
#define CQ_MASK ((CQ_LEN + 1) * 1024 - 1)
#define CQ_MASKL (CQ_MASK & 0xffff)
#define CQ_MASKH (CQ_MASK >> 16)
#if 0
static void
GLAMODumpRegs(GlamoPtr pGlamo, CARD16 from, CARD16 to);
static void
GLAMODebugFifo(GlamoPtr pGlamo)
{
GLAMOCardInfo *glamoc = pGlamo->glamoc;
char *mmio = glamoc->reg_base;
CARD32 offset;
ErrorF("GLAMO_REG_CMDQ_STATUS: 0x%04x\n",
MMIO_IN16(mmio, GLAMO_REG_CMDQ_STATUS));
offset = MMIO_IN16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRL);
offset |= (MMIO_IN16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRH) << 16) & 0x7;
ErrorF("GLAMO_REG_CMDQ_WRITE_ADDR: 0x%08x\n", (unsigned int) offset);
offset = MMIO_IN16(mmio, GLAMO_REG_CMDQ_READ_ADDRL);
offset |= (MMIO_IN16(mmio, GLAMO_REG_CMDQ_READ_ADDRH) << 16) & 0x7;
ErrorF("GLAMO_REG_CMDQ_READ_ADDR: 0x%08x\n", (unsigned int) offset);
}
#endif
void
GLAMODispatchCMDQ(GlamoPtr pGlamo)
{
MemBuf *buf = pGlamo->cmd_queue;
volatile char *mmio = pGlamo->reg_base;
char *addr;
size_t count, ring_count;
size_t rest_size;
size_t ring_read;
size_t new_ring_write;
size_t ring_write;
if (!buf->used)
return;
addr = buf->data;
count = buf->used;
ring_count = pGlamo->ring_len;
ring_write = MMIO_IN16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRL);
ring_write |= MMIO_IN16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRH) << 16;
new_ring_write = (((ring_write + count) & CQ_MASK) + 1) & ~1;
/* Wait until there is enough space to queue the cmd buffer */
if (new_ring_write > ring_write) {
do {
ring_read = MMIO_IN16(mmio, GLAMO_REG_CMDQ_READ_ADDRL) & CQ_MASKL;
ring_read |= ((MMIO_IN16(mmio, GLAMO_REG_CMDQ_READ_ADDRH) & CQ_MASKH) << 16);
} while(ring_read > ring_write && ring_read < new_ring_write);
} else {
do {
ring_read = MMIO_IN16(mmio, GLAMO_REG_CMDQ_READ_ADDRL) & CQ_MASKL;
ring_read |= ((MMIO_IN16(mmio, GLAMO_REG_CMDQ_READ_ADDRH) & CQ_MASKH) << 16);
} while(ring_read > ring_write || ring_read < new_ring_write);
}
/* Wrap around */
if (ring_write >= new_ring_write) {
rest_size = (ring_count - ring_write);
memcpy(pGlamo->ring_addr + ring_write, addr, rest_size);
memcpy(pGlamo->ring_addr, addr+rest_size, count - rest_size);
/* ring_write being 0 will result in a deadlock because the cmdq read
* will never stop. To avoid such an behaviour insert an empty
* instruction. */
if (new_ring_write == 0) {
memset(pGlamo->ring_addr, 0, 4);
new_ring_write = 4;
}
/* The write position has to change to trigger a read */
if (ring_write == new_ring_write) {
memset(pGlamo->ring_addr + new_ring_write, 0, 4);
new_ring_write += 4;
}
} else {
memcpy(pGlamo->ring_addr + ring_write, addr, count);
}
/* In Theory waiting for the CMDQ to be ready should be enough, but
* unfortunally this causes visual artifacts sometimes */
GLAMOEngineWait(pGlamo, GLAMO_ENGINE_ALL);
MMIOSetBitMask(mmio, GLAMO_REG_CLOCK_2D,
GLAMO_CLOCK_2D_EN_M6CLK,
0);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRH,
(new_ring_write >> 16) & CQ_MASKH);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRL,
new_ring_write & CQ_MASKL);
MMIOSetBitMask(mmio, GLAMO_REG_CLOCK_2D,
GLAMO_CLOCK_2D_EN_M6CLK,
0xffff);
buf->used = 0;
}
static void
GLAMOCMDQResetCP(GlamoPtr pGlamo)
{
volatile char *mmio = pGlamo->reg_base;
/* make the decoder happy? */
memset(pGlamo->ring_addr, 0, pGlamo->ring_len);
GLAMOEngineReset(pGlamo, GLAMO_ENGINE_CMDQ);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_BASE_ADDRL,
pGlamo->ring_start & 0xffff);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_BASE_ADDRH,
(pGlamo->ring_start >> 16) & 0x7f);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_LEN, CQ_LEN);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRH, 0);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_WRITE_ADDRL, 0);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_READ_ADDRH, 0);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_READ_ADDRL, 0);
MMIO_OUT16(mmio, GLAMO_REG_CMDQ_CONTROL,
1 << 12 |
5 << 8 |
8 << 4);
GLAMOEngineWait(pGlamo, GLAMO_ENGINE_ALL);
}
size_t
GLAMOCMDQInit(ScrnInfoPtr pScrn, size_t mem_start, size_t mem_size)
{
GlamoPtr pGlamo = GlamoPTR(pScrn);
MemBuf *buf;
pGlamo->ring_start = mem_start;
pGlamo->ring_addr = pGlamo->fbstart + pGlamo->ring_start;
pGlamo->ring_len = (CQ_LEN + 1) * 1024;
buf = (MemBuf *)calloc(1, sizeof(MemBuf) + pGlamo->ring_len);
if (!buf) {
return FALSE;
}
buf->size = pGlamo->ring_len;
buf->used = 0;
pGlamo->cmd_queue = buf;
return pGlamo->ring_len;
}
Bool
GLAMOCMDQEnable(ScrnInfoPtr pScrn) {
GlamoPtr pGlamo = GlamoPTR(pScrn);
GLAMOEngineEnable(pGlamo, GLAMO_ENGINE_CMDQ);
GLAMOCMDQResetCP(pGlamo);
return TRUE;
}
void
GLAMOCMDQDisable(ScrnInfoPtr pScrn) {
GlamoPtr pGlamo = GlamoPTR(pScrn);
GLAMOEngineWait(pGlamo, GLAMO_ENGINE_ALL);
GLAMOEngineDisable(pGlamo, GLAMO_ENGINE_CMDQ);
}
void
GLAMOCMDQFini(ScrnInfoPtr pScrn) {
GlamoPtr pGlamo = GlamoPTR(pScrn);
GLAMOCMDQDisable(pScrn);
if (pGlamo->cmd_queue) {
free(pGlamo->cmd_queue);
pGlamo->cmd_queue = NULL;
}
}
#if 0
static void
GLAMODumpRegs(GlamoPtr pGlamo,
CARD16 from,
CARD16 to)
{
int i=0;
for (i=from; i <= to; i += 2) {
ErrorF("reg:%p, val:%#x\n",
pGlamo->reg_base+i,
*(VOL16*)(pGlamo->reg_base+i));
}
}
#endif
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