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Refactor bcm2835_cpufreq to use bcm2835_mbox_property API

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This commit is contained in:
Oleksandr Tymoshenko 2015-11-11 00:45:41 +00:00
parent e597fdb889
commit cd3903c620
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=290667
1 changed files with 134 additions and 360 deletions
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494
sys/arm/broadcom/bcm2835/bcm2835_cpufreq.c
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@ -115,13 +115,6 @@ struct bcm2835_cpufreq_softc {
int voltage_sdram_p;
int turbo_mode;
/* mbox buffer (physical address) */
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
bus_size_t dma_size;
void *dma_buf;
bus_addr_t dma_phys;
/* initial hook for waiting mbox intr */
struct intr_config_hook init_hook;
};
@ -150,85 +143,11 @@ bcm2835_dump(const void *data, int len)
}
#endif
static int
bcm2835_mbox_call_prop(struct bcm2835_cpufreq_softc *sc)
{
struct bcm2835_mbox_hdr *msg = (struct bcm2835_mbox_hdr *)sc->dma_buf;
struct bcm2835_mbox_tag_hdr *tag, *last;
uint8_t *up;
device_t mbox;
size_t hdr_size;
int idx;
int err;
/*
* For multiple calls, locking is not here. The caller must have
* VC semaphore.
*/
/* get mbox device */
mbox = devclass_get_device(devclass_find("mbox"), 0);
if (mbox == NULL) {
device_printf(sc->dev, "can't find mbox\n");
return (-1);
}
/* go mailbox property */
#ifdef PROP_DEBUG
bcm2835_dump(msg, 64);
#endif
bus_dmamap_sync(sc->dma_tag, sc->dma_map,
BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_PROP, (uint32_t)sc->dma_phys);
MBOX_READ(mbox, BCM2835_MBOX_CHAN_PROP, &err);
bus_dmamap_sync(sc->dma_tag, sc->dma_map, BUS_DMASYNC_POSTREAD);
#ifdef PROP_DEBUG
bcm2835_dump(msg, 64);
#endif
/* check response code */
if (msg->code != BCM2835_MBOX_CODE_RESP_SUCCESS) {
device_printf(sc->dev, "mbox response error\n");
return (-1);
}
/* tag = first tag */
up = (uint8_t *)msg;
hdr_size = sizeof(struct bcm2835_mbox_hdr);
tag = (struct bcm2835_mbox_tag_hdr *)(up + hdr_size);
/* last = end of buffer specified by header */
last = (struct bcm2835_mbox_tag_hdr *)(up + msg->buf_size);
/* loop unitl end tag (=0x0) */
hdr_size = sizeof(struct bcm2835_mbox_tag_hdr);
for (idx = 0; tag->tag != 0; idx++) {
if ((tag->val_len & BCM2835_MBOX_TAG_VAL_LEN_RESPONSE) == 0) {
device_printf(sc->dev, "tag%d response error\n", idx);
return (-1);
}
/* clear response bit */
tag->val_len &= ~BCM2835_MBOX_TAG_VAL_LEN_RESPONSE;
/* get next tag */
up = (uint8_t *)tag;
tag = (struct bcm2835_mbox_tag_hdr *)(up + hdr_size +
tag->val_buf_size);
/* check buffer size of header */
if (tag > last) {
device_printf(sc->dev, "mbox buffer size error\n");
return (-1);
}
}
return (0);
}
static int
bcm2835_cpufreq_get_clock_rate(struct bcm2835_cpufreq_softc *sc,
uint32_t clock_id)
{
struct msg_get_clock_rate *msg;
struct msg_get_clock_rate msg;
int rate;
int err;
@ -246,26 +165,18 @@ bcm2835_cpufreq_get_clock_rate(struct bcm2835_cpufreq_softc *sc,
* u32: rate (in Hz)
*/
/* using DMA buffer for VC */
msg = (struct msg_get_clock_rate *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_CLOCK_RATE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.clock_id = clock_id;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_CLOCK_RATE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.clock_id = clock_id;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get clock rate (id=%u)\n",
clock_id);
@ -273,7 +184,7 @@ bcm2835_cpufreq_get_clock_rate(struct bcm2835_cpufreq_softc *sc,
}
/* result (Hz) */
rate = (int)msg->body.resp.rate_hz;
rate = (int)msg.body.resp.rate_hz;
DPRINTF("clock = %d(Hz)\n", rate);
return (rate);
}
@ -282,7 +193,7 @@ static int
bcm2835_cpufreq_get_max_clock_rate(struct bcm2835_cpufreq_softc *sc,
uint32_t clock_id)
{
struct msg_get_max_clock_rate *msg;
struct msg_get_max_clock_rate msg;
int rate;
int err;
@ -300,26 +211,18 @@ bcm2835_cpufreq_get_max_clock_rate(struct bcm2835_cpufreq_softc *sc,
* u32: rate (in Hz)
*/
/* using DMA buffer for VC */
msg = (struct msg_get_max_clock_rate *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_MAX_CLOCK_RATE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.clock_id = clock_id;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_MAX_CLOCK_RATE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.clock_id = clock_id;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get max clock rate (id=%u)\n",
clock_id);
@ -327,7 +230,7 @@ bcm2835_cpufreq_get_max_clock_rate(struct bcm2835_cpufreq_softc *sc,
}
/* result (Hz) */
rate = (int)msg->body.resp.rate_hz;
rate = (int)msg.body.resp.rate_hz;
DPRINTF("clock = %d(Hz)\n", rate);
return (rate);
}
@ -336,7 +239,7 @@ static int
bcm2835_cpufreq_get_min_clock_rate(struct bcm2835_cpufreq_softc *sc,
uint32_t clock_id)
{
struct msg_get_min_clock_rate *msg;
struct msg_get_min_clock_rate msg;
int rate;
int err;
@ -354,26 +257,18 @@ bcm2835_cpufreq_get_min_clock_rate(struct bcm2835_cpufreq_softc *sc,
* u32: rate (in Hz)
*/
/* using DMA buffer for VC */
msg = (struct msg_get_min_clock_rate *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_MIN_CLOCK_RATE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.clock_id = clock_id;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_MIN_CLOCK_RATE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.clock_id = clock_id;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get min clock rate (id=%u)\n",
clock_id);
@ -381,7 +276,7 @@ bcm2835_cpufreq_get_min_clock_rate(struct bcm2835_cpufreq_softc *sc,
}
/* result (Hz) */
rate = (int)msg->body.resp.rate_hz;
rate = (int)msg.body.resp.rate_hz;
DPRINTF("clock = %d(Hz)\n", rate);
return (rate);
}
@ -390,7 +285,7 @@ static int
bcm2835_cpufreq_set_clock_rate(struct bcm2835_cpufreq_softc *sc,
uint32_t clock_id, uint32_t rate_hz)
{
struct msg_set_clock_rate *msg;
struct msg_set_clock_rate msg;
int rate;
int err;
@ -409,27 +304,19 @@ bcm2835_cpufreq_set_clock_rate(struct bcm2835_cpufreq_softc *sc,
* u32: rate (in Hz)
*/
/* using DMA buffer for VC */
msg = (struct msg_set_clock_rate *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_SET_CLOCK_RATE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.clock_id = clock_id;
msg->body.req.rate_hz = rate_hz;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_CLOCK_RATE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.clock_id = clock_id;
msg.body.req.rate_hz = rate_hz;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't set clock rate (id=%u)\n",
clock_id);
@ -447,18 +334,18 @@ bcm2835_cpufreq_set_clock_rate(struct bcm2835_cpufreq_softc *sc,
*/
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_SET_CLOCK_RATE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.clock_id = clock_id;
msg->body.req.rate_hz = rate_hz;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_CLOCK_RATE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.clock_id = clock_id;
msg.body.req.rate_hz = rate_hz;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev,
"can't set clock rate (id=%u)\n", clock_id);
@ -467,7 +354,7 @@ bcm2835_cpufreq_set_clock_rate(struct bcm2835_cpufreq_softc *sc,
}
/* result (Hz) */
rate = (int)msg->body.resp.rate_hz;
rate = (int)msg.body.resp.rate_hz;
DPRINTF("clock = %d(Hz)\n", rate);
return (rate);
}
@ -475,7 +362,7 @@ bcm2835_cpufreq_set_clock_rate(struct bcm2835_cpufreq_softc *sc,
static int
bcm2835_cpufreq_get_turbo(struct bcm2835_cpufreq_softc *sc)
{
struct msg_get_turbo *msg;
struct msg_get_turbo msg;
int level;
int err;
@ -493,33 +380,25 @@ bcm2835_cpufreq_get_turbo(struct bcm2835_cpufreq_softc *sc)
* u32: level
*/
/* using DMA buffer for VC */
msg = (struct msg_get_turbo *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_TURBO;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.id = 0;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_TURBO;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.id = 0;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get turbo\n");
return (MSG_ERROR);
}
/* result 0=non-turbo, 1=turbo */
level = (int)msg->body.resp.level;
level = (int)msg.body.resp.level;
DPRINTF("level = %d\n", level);
return (level);
}
@ -527,7 +406,7 @@ bcm2835_cpufreq_get_turbo(struct bcm2835_cpufreq_softc *sc)
static int
bcm2835_cpufreq_set_turbo(struct bcm2835_cpufreq_softc *sc, uint32_t level)
{
struct msg_set_turbo *msg;
struct msg_set_turbo msg;
int value;
int err;
@ -546,38 +425,30 @@ bcm2835_cpufreq_set_turbo(struct bcm2835_cpufreq_softc *sc, uint32_t level)
* u32: level
*/
/* using DMA buffer for VC */
msg = (struct msg_set_turbo *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* replace unknown value to OFF */
if (level != BCM2835_MBOX_TURBO_ON && level != BCM2835_MBOX_TURBO_OFF)
level = BCM2835_MBOX_TURBO_OFF;
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_SET_TURBO;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.id = 0;
msg->body.req.level = level;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_TURBO;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.id = 0;
msg.body.req.level = level;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't set turbo\n");
return (MSG_ERROR);
}
/* result 0=non-turbo, 1=turbo */
value = (int)msg->body.resp.level;
value = (int)msg.body.resp.level;
DPRINTF("level = %d\n", value);
return (value);
}
@ -586,7 +457,7 @@ static int
bcm2835_cpufreq_get_voltage(struct bcm2835_cpufreq_softc *sc,
uint32_t voltage_id)
{
struct msg_get_voltage *msg;
struct msg_get_voltage msg;
int value;
int err;
@ -604,33 +475,25 @@ bcm2835_cpufreq_get_voltage(struct bcm2835_cpufreq_softc *sc,
* u32: value (offset from 1.2V in units of 0.025V)
*/
/* using DMA buffer for VC */
msg = (struct msg_get_voltage *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_VOLTAGE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.voltage_id = voltage_id;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_VOLTAGE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.voltage_id = voltage_id;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get voltage\n");
return (MSG_ERROR);
}
/* result (offset from 1.2V) */
value = (int)msg->body.resp.value;
value = (int)msg.body.resp.value;
DPRINTF("value = %d\n", value);
return (value);
}
@ -639,7 +502,7 @@ static int
bcm2835_cpufreq_get_max_voltage(struct bcm2835_cpufreq_softc *sc,
uint32_t voltage_id)
{
struct msg_get_max_voltage *msg;
struct msg_get_max_voltage msg;
int value;
int err;
@ -657,33 +520,25 @@ bcm2835_cpufreq_get_max_voltage(struct bcm2835_cpufreq_softc *sc,
* u32: value (offset from 1.2V in units of 0.025V)
*/
/* using DMA buffer for VC */
msg = (struct msg_get_max_voltage *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_MAX_VOLTAGE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.voltage_id = voltage_id;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_MAX_VOLTAGE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.voltage_id = voltage_id;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get max voltage\n");
return (MSG_ERROR);
}
/* result (offset from 1.2V) */
value = (int)msg->body.resp.value;
value = (int)msg.body.resp.value;
DPRINTF("value = %d\n", value);
return (value);
}
@ -691,7 +546,7 @@ static int
bcm2835_cpufreq_get_min_voltage(struct bcm2835_cpufreq_softc *sc,
uint32_t voltage_id)
{
struct msg_get_min_voltage *msg;
struct msg_get_min_voltage msg;
int value;
int err;
@ -709,33 +564,25 @@ bcm2835_cpufreq_get_min_voltage(struct bcm2835_cpufreq_softc *sc,
* u32: value (offset from 1.2V in units of 0.025V)
*/
/* using DMA buffer for VC */
msg = (struct msg_get_min_voltage *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_MIN_VOLTAGE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.voltage_id = voltage_id;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_MIN_VOLTAGE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.voltage_id = voltage_id;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get min voltage\n");
return (MSG_ERROR);
}
/* result (offset from 1.2V) */
value = (int)msg->body.resp.value;
value = (int)msg.body.resp.value;
DPRINTF("value = %d\n", value);
return (value);
}
@ -744,7 +591,7 @@ static int
bcm2835_cpufreq_set_voltage(struct bcm2835_cpufreq_softc *sc,
uint32_t voltage_id, int32_t value)
{
struct msg_set_voltage *msg;
struct msg_set_voltage msg;
int err;
/*
@ -773,34 +620,26 @@ bcm2835_cpufreq_set_voltage(struct bcm2835_cpufreq_softc *sc,
return (MSG_ERROR);
}
/* using DMA buffer for VC */
msg = (struct msg_set_voltage *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_SET_VOLTAGE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.voltage_id = voltage_id;
msg->body.req.value = (uint32_t)value;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_VOLTAGE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.voltage_id = voltage_id;
msg.body.req.value = (uint32_t)value;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't set voltage\n");
return (MSG_ERROR);
}
/* result (offset from 1.2V) */
value = (int)msg->body.resp.value;
value = (int)msg.body.resp.value;
DPRINTF("value = %d\n", value);
return (value);
}
@ -808,7 +647,7 @@ bcm2835_cpufreq_set_voltage(struct bcm2835_cpufreq_softc *sc,
static int
bcm2835_cpufreq_get_temperature(struct bcm2835_cpufreq_softc *sc)
{
struct msg_get_temperature *msg;
struct msg_get_temperature msg;
int value;
int err;
@ -826,33 +665,25 @@ bcm2835_cpufreq_get_temperature(struct bcm2835_cpufreq_softc *sc)
* u32: value
*/
/* using DMA buffer for VC */
msg = (struct msg_get_temperature *)sc->dma_buf;
if (sizeof(*msg) > sc->dma_size) {
device_printf(sc->dev, "DMA size overflow (%zu>%lu)\n",
sizeof(*msg), sc->dma_size);
return (MSG_ERROR);
}
/* setup single tag buffer */
memset(msg, 0, sizeof(*msg));
msg->hdr.buf_size = sizeof(*msg);
msg->hdr.code = BCM2835_MBOX_CODE_REQ;
msg->tag_hdr.tag = BCM2835_MBOX_TAG_GET_TEMPERATURE;
msg->tag_hdr.val_buf_size = sizeof(msg->body);
msg->tag_hdr.val_len = sizeof(msg->body.req);
msg->body.req.temperature_id = 0;
msg->end_tag = 0;
memset(&msg, 0, sizeof(msg));
msg.hdr.buf_size = sizeof(msg);
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_TEMPERATURE;
msg.tag_hdr.val_buf_size = sizeof(msg.body);
msg.tag_hdr.val_len = sizeof(msg.body.req);
msg.body.req.temperature_id = 0;
msg.end_tag = 0;
/* call mailbox property */
err = bcm2835_mbox_call_prop(sc);
err = bcm2835_mbox_property(&msg, sizeof(msg));
if (err) {
device_printf(sc->dev, "can't get temperature\n");
return (MSG_ERROR);
}
/* result (temperature of degree C) */
value = (int)msg->body.resp.value;
value = (int)msg.body.resp.value;
DPRINTF("value = %d\n", value);
return (value);
}
@ -1432,23 +1263,11 @@ bcm2835_cpufreq_probe(device_t dev)
return (0);
}
static void
bcm2835_cpufreq_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
{
bus_addr_t *addr;
if (err)
return;
addr = (bus_addr_t *)arg;
*addr = PHYS_TO_VCBUS(segs[0].ds_addr);
}
static int
bcm2835_cpufreq_attach(device_t dev)
{
struct bcm2835_cpufreq_softc *sc;
struct sysctl_oid *oid;
int err;
/* set self dev */
sc = device_get_softc(dev);
@ -1464,41 +1283,6 @@ bcm2835_cpufreq_attach(device_t dev)
sc->max_voltage_core = 0;
sc->min_voltage_core = 0;
/* create VC mbox buffer */
sc->dma_size = PAGE_SIZE;
err = bus_dma_tag_create(
bus_get_dma_tag(sc->dev),
PAGE_SIZE, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sc->dma_size, 1, /* maxsize, nsegments */
sc->dma_size, 0, /* maxsegsize, flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->dma_tag);
if (err) {
device_printf(dev, "can't create DMA tag\n");
return (ENXIO);
}
err = bus_dmamem_alloc(sc->dma_tag, (void **)&sc->dma_buf, 0,
&sc->dma_map);
if (err) {
bus_dma_tag_destroy(sc->dma_tag);
device_printf(dev, "can't allocate dmamem\n");
return (ENXIO);
}
err = bus_dmamap_load(sc->dma_tag, sc->dma_map, sc->dma_buf,
sc->dma_size, bcm2835_cpufreq_cb, &sc->dma_phys, 0);
if (err) {
bus_dmamem_free(sc->dma_tag, sc->dma_buf, sc->dma_map);
bus_dma_tag_destroy(sc->dma_tag);
device_printf(dev, "can't load DMA map\n");
return (ENXIO);
}
/* OK, ready to use VC buffer */
/* setup sysctl at first device */
if (device_get_unit(dev) == 0) {
sysctl_ctx_init(&bcm2835_sysctl_ctx);
@ -1568,9 +1352,6 @@ bcm2835_cpufreq_attach(device_t dev)
sc->init_hook.ich_arg = sc;
if (config_intrhook_establish(&sc->init_hook) != 0) {
bus_dmamap_unload(sc->dma_tag, sc->dma_map);
bus_dmamem_free(sc->dma_tag, sc->dma_buf, sc->dma_map);
bus_dma_tag_destroy(sc->dma_tag);
device_printf(dev, "config_intrhook_establish failed\n");
return (ENOMEM);
}
@ -1590,13 +1371,6 @@ bcm2835_cpufreq_detach(device_t dev)
sema_destroy(&vc_sema);
if (sc->dma_phys != 0)
bus_dmamap_unload(sc->dma_tag, sc->dma_map);
if (sc->dma_buf != NULL)
bus_dmamem_free(sc->dma_tag, sc->dma_buf, sc->dma_map);
if (sc->dma_tag != NULL)
bus_dma_tag_destroy(sc->dma_tag);
return (cpufreq_unregister(dev));
}