diff options
Diffstat (limited to 'drivers/firmware/arm_scpi.c')
-rw-r--r-- | drivers/firmware/arm_scpi.c | 216 |
1 files changed, 129 insertions, 87 deletions
diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index dfb373c..7da9f1b 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -28,7 +28,6 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/bitmap.h> -#include <linux/bitfield.h> #include <linux/device.h> #include <linux/err.h> #include <linux/export.h> @@ -73,13 +72,21 @@ #define MAX_DVFS_DOMAINS 8 #define MAX_DVFS_OPPS 16 - -#define PROTO_REV_MAJOR_MASK GENMASK(31, 16) -#define PROTO_REV_MINOR_MASK GENMASK(15, 0) - -#define FW_REV_MAJOR_MASK GENMASK(31, 24) -#define FW_REV_MINOR_MASK GENMASK(23, 16) -#define FW_REV_PATCH_MASK GENMASK(15, 0) +#define DVFS_LATENCY(hdr) (le32_to_cpu(hdr) >> 16) +#define DVFS_OPP_COUNT(hdr) ((le32_to_cpu(hdr) >> 8) & 0xff) + +#define PROTOCOL_REV_MINOR_BITS 16 +#define PROTOCOL_REV_MINOR_MASK ((1U << PROTOCOL_REV_MINOR_BITS) - 1) +#define PROTOCOL_REV_MAJOR(x) ((x) >> PROTOCOL_REV_MINOR_BITS) +#define PROTOCOL_REV_MINOR(x) ((x) & PROTOCOL_REV_MINOR_MASK) + +#define FW_REV_MAJOR_BITS 24 +#define FW_REV_MINOR_BITS 16 +#define FW_REV_PATCH_MASK ((1U << FW_REV_MINOR_BITS) - 1) +#define FW_REV_MINOR_MASK ((1U << FW_REV_MAJOR_BITS) - 1) +#define FW_REV_MAJOR(x) ((x) >> FW_REV_MAJOR_BITS) +#define FW_REV_MINOR(x) (((x) & FW_REV_MINOR_MASK) >> FW_REV_MINOR_BITS) +#define FW_REV_PATCH(x) ((x) & FW_REV_PATCH_MASK) #define MAX_RX_TIMEOUT (msecs_to_jiffies(30)) @@ -304,6 +311,10 @@ struct clk_get_info { u8 name[20]; } __packed; +struct clk_get_value { + __le32 rate; +} __packed; + struct clk_set_value { __le16 id; __le16 reserved; @@ -317,9 +328,7 @@ struct legacy_clk_set_value { } __packed; struct dvfs_info { - u8 domain; - u8 opp_count; - __le16 latency; + __le32 header; struct { __le32 freq; __le32 m_volt; @@ -342,6 +351,11 @@ struct _scpi_sensor_info { char name[20]; }; +struct sensor_value { + __le32 lo_val; + __le32 hi_val; +} __packed; + struct dev_pstate_set { __le16 dev_id; u8 pstate; @@ -405,20 +419,19 @@ static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd) unsigned int len; if (scpi_info->is_legacy) { - struct legacy_scpi_shared_mem __iomem *mem = - ch->rx_payload; + struct legacy_scpi_shared_mem *mem = ch->rx_payload; /* RX Length is not replied by the legacy Firmware */ len = match->rx_len; - match->status = ioread32(&mem->status); + match->status = le32_to_cpu(mem->status); memcpy_fromio(match->rx_buf, mem->payload, len); } else { - struct scpi_shared_mem __iomem *mem = ch->rx_payload; + struct scpi_shared_mem *mem = ch->rx_payload; len = min(match->rx_len, CMD_SIZE(cmd)); - match->status = ioread32(&mem->status); + match->status = le32_to_cpu(mem->status); memcpy_fromio(match->rx_buf, mem->payload, len); } @@ -432,11 +445,11 @@ static void scpi_process_cmd(struct scpi_chan *ch, u32 cmd) static void scpi_handle_remote_msg(struct mbox_client *c, void *msg) { struct scpi_chan *ch = container_of(c, struct scpi_chan, cl); - struct scpi_shared_mem __iomem *mem = ch->rx_payload; + struct scpi_shared_mem *mem = ch->rx_payload; u32 cmd = 0; if (!scpi_info->is_legacy) - cmd = ioread32(&mem->command); + cmd = le32_to_cpu(mem->command); scpi_process_cmd(ch, cmd); } @@ -446,7 +459,7 @@ static void scpi_tx_prepare(struct mbox_client *c, void *msg) unsigned long flags; struct scpi_xfer *t = msg; struct scpi_chan *ch = container_of(c, struct scpi_chan, cl); - struct scpi_shared_mem __iomem *mem = ch->tx_payload; + struct scpi_shared_mem *mem = (struct scpi_shared_mem *)ch->tx_payload; if (t->tx_buf) { if (scpi_info->is_legacy) @@ -465,7 +478,7 @@ static void scpi_tx_prepare(struct mbox_client *c, void *msg) } if (!scpi_info->is_legacy) - iowrite32(t->cmd, &mem->command); + mem->command = cpu_to_le32(t->cmd); } static struct scpi_xfer *get_scpi_xfer(struct scpi_chan *ch) @@ -570,13 +583,13 @@ scpi_clk_get_range(u16 clk_id, unsigned long *min, unsigned long *max) static unsigned long scpi_clk_get_val(u16 clk_id) { int ret; - __le32 rate; + struct clk_get_value clk; __le16 le_clk_id = cpu_to_le16(clk_id); ret = scpi_send_message(CMD_GET_CLOCK_VALUE, &le_clk_id, - sizeof(le_clk_id), &rate, sizeof(rate)); + sizeof(le_clk_id), &clk, sizeof(clk)); - return ret ? ret : le32_to_cpu(rate); + return ret ? ret : le32_to_cpu(clk.rate); } static int scpi_clk_set_val(u16 clk_id, unsigned long rate) @@ -632,34 +645,34 @@ static int opp_cmp_func(const void *opp1, const void *opp2) static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain) { - if (domain >= MAX_DVFS_DOMAINS) - return ERR_PTR(-EINVAL); - - return scpi_info->dvfs[domain] ?: ERR_PTR(-EINVAL); -} - -static int scpi_dvfs_populate_info(struct device *dev, u8 domain) -{ struct scpi_dvfs_info *info; struct scpi_opp *opp; struct dvfs_info buf; int ret, i; + if (domain >= MAX_DVFS_DOMAINS) + return ERR_PTR(-EINVAL); + + if (scpi_info->dvfs[domain]) /* data already populated */ + return scpi_info->dvfs[domain]; + ret = scpi_send_message(CMD_GET_DVFS_INFO, &domain, sizeof(domain), &buf, sizeof(buf)); if (ret) - return ret; + return ERR_PTR(ret); - info = devm_kmalloc(dev, sizeof(*info), GFP_KERNEL); + info = kmalloc(sizeof(*info), GFP_KERNEL); if (!info) - return -ENOMEM; + return ERR_PTR(-ENOMEM); - info->count = buf.opp_count; - info->latency = le16_to_cpu(buf.latency) * 1000; /* uS to nS */ + info->count = DVFS_OPP_COUNT(buf.header); + info->latency = DVFS_LATENCY(buf.header) * 1000; /* uS to nS */ - info->opps = devm_kcalloc(dev, info->count, sizeof(*opp), GFP_KERNEL); - if (!info->opps) - return -ENOMEM; + info->opps = kcalloc(info->count, sizeof(*opp), GFP_KERNEL); + if (!info->opps) { + kfree(info); + return ERR_PTR(-ENOMEM); + } for (i = 0, opp = info->opps; i < info->count; i++, opp++) { opp->freq = le32_to_cpu(buf.opps[i].freq); @@ -669,15 +682,7 @@ static int scpi_dvfs_populate_info(struct device *dev, u8 domain) sort(info->opps, info->count, sizeof(*opp), opp_cmp_func, NULL); scpi_info->dvfs[domain] = info; - return 0; -} - -static void scpi_dvfs_populate(struct device *dev) -{ - int domain; - - for (domain = 0; domain < MAX_DVFS_DOMAINS; domain++) - scpi_dvfs_populate_info(dev, domain); + return info; } static int scpi_dev_domain_id(struct device *dev) @@ -708,6 +713,9 @@ static int scpi_dvfs_get_transition_latency(struct device *dev) if (IS_ERR(info)) return PTR_ERR(info); + if (!info->latency) + return 0; + return info->latency; } @@ -768,19 +776,20 @@ static int scpi_sensor_get_info(u16 sensor_id, struct scpi_sensor_info *info) static int scpi_sensor_get_value(u16 sensor, u64 *val) { __le16 id = cpu_to_le16(sensor); - __le64 value; + struct sensor_value buf; int ret; ret = scpi_send_message(CMD_SENSOR_VALUE, &id, sizeof(id), - &value, sizeof(value)); + &buf, sizeof(buf)); if (ret) return ret; if (scpi_info->is_legacy) - /* only 32-bits supported, upper 32 bits can be junk */ - *val = le32_to_cpup((__le32 *)&value); + /* only 32-bits supported, hi_val can be junk */ + *val = le32_to_cpu(buf.lo_val); else - *val = le64_to_cpu(value); + *val = (u64)le32_to_cpu(buf.hi_val) << 32 | + le32_to_cpu(buf.lo_val); return 0; } @@ -853,19 +862,23 @@ static int scpi_init_versions(struct scpi_drvinfo *info) static ssize_t protocol_version_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%lu.%lu\n", - FIELD_GET(PROTO_REV_MAJOR_MASK, scpi_info->protocol_version), - FIELD_GET(PROTO_REV_MINOR_MASK, scpi_info->protocol_version)); + struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev); + + return sprintf(buf, "%d.%d\n", + PROTOCOL_REV_MAJOR(scpi_info->protocol_version), + PROTOCOL_REV_MINOR(scpi_info->protocol_version)); } static DEVICE_ATTR_RO(protocol_version); static ssize_t firmware_version_show(struct device *dev, struct device_attribute *attr, char *buf) { - return sprintf(buf, "%lu.%lu.%lu\n", - FIELD_GET(FW_REV_MAJOR_MASK, scpi_info->firmware_version), - FIELD_GET(FW_REV_MINOR_MASK, scpi_info->firmware_version), - FIELD_GET(FW_REV_PATCH_MASK, scpi_info->firmware_version)); + struct scpi_drvinfo *scpi_info = dev_get_drvdata(dev); + + return sprintf(buf, "%d.%d.%d\n", + FW_REV_MAJOR(scpi_info->firmware_version), + FW_REV_MINOR(scpi_info->firmware_version), + FW_REV_PATCH(scpi_info->firmware_version)); } static DEVICE_ATTR_RO(firmware_version); @@ -876,13 +889,39 @@ static struct attribute *versions_attrs[] = { }; ATTRIBUTE_GROUPS(versions); -static void scpi_free_channels(void *data) +static void +scpi_free_channels(struct device *dev, struct scpi_chan *pchan, int count) { - struct scpi_drvinfo *info = data; int i; - for (i = 0; i < info->num_chans; i++) - mbox_free_channel(info->channels[i].chan); + for (i = 0; i < count && pchan->chan; i++, pchan++) { + mbox_free_channel(pchan->chan); + devm_kfree(dev, pchan->xfers); + devm_iounmap(dev, pchan->rx_payload); + } +} + +static int scpi_remove(struct platform_device *pdev) +{ + int i; + struct device *dev = &pdev->dev; + struct scpi_drvinfo *info = platform_get_drvdata(pdev); + + scpi_info = NULL; /* stop exporting SCPI ops through get_scpi_ops */ + + of_platform_depopulate(dev); + sysfs_remove_groups(&dev->kobj, versions_groups); + scpi_free_channels(dev, info->channels, info->num_chans); + platform_set_drvdata(pdev, NULL); + + for (i = 0; i < MAX_DVFS_DOMAINS && info->dvfs[i]; i++) { + kfree(info->dvfs[i]->opps); + kfree(info->dvfs[i]); + } + devm_kfree(dev, info->channels); + devm_kfree(dev, info); + + return 0; } #define MAX_SCPI_XFERS 10 @@ -913,6 +952,7 @@ static int scpi_probe(struct platform_device *pdev) { int count, idx, ret; struct resource res; + struct scpi_chan *scpi_chan; struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; @@ -929,19 +969,13 @@ static int scpi_probe(struct platform_device *pdev) return -ENODEV; } - scpi_info->channels = devm_kcalloc(dev, count, sizeof(struct scpi_chan), - GFP_KERNEL); - if (!scpi_info->channels) + scpi_chan = devm_kcalloc(dev, count, sizeof(*scpi_chan), GFP_KERNEL); + if (!scpi_chan) return -ENOMEM; - ret = devm_add_action(dev, scpi_free_channels, scpi_info); - if (ret) - return ret; - - for (; scpi_info->num_chans < count; scpi_info->num_chans++) { + for (idx = 0; idx < count; idx++) { resource_size_t size; - int idx = scpi_info->num_chans; - struct scpi_chan *pchan = scpi_info->channels + idx; + struct scpi_chan *pchan = scpi_chan + idx; struct mbox_client *cl = &pchan->cl; struct device_node *shmem = of_parse_phandle(np, "shmem", idx); @@ -949,14 +983,15 @@ static int scpi_probe(struct platform_device *pdev) of_node_put(shmem); if (ret) { dev_err(dev, "failed to get SCPI payload mem resource\n"); - return ret; + goto err; } size = resource_size(&res); pchan->rx_payload = devm_ioremap(dev, res.start, size); if (!pchan->rx_payload) { dev_err(dev, "failed to ioremap SCPI payload\n"); - return -EADDRNOTAVAIL; + ret = -EADDRNOTAVAIL; + goto err; } pchan->tx_payload = pchan->rx_payload + (size >> 1); @@ -982,11 +1017,17 @@ static int scpi_probe(struct platform_device *pdev) dev_err(dev, "failed to get channel%d err %d\n", idx, ret); } +err: + scpi_free_channels(dev, scpi_chan, idx); + scpi_info = NULL; return ret; } + scpi_info->channels = scpi_chan; + scpi_info->num_chans = count; scpi_info->commands = scpi_std_commands; - scpi_info->scpi_ops = &scpi_ops; + + platform_set_drvdata(pdev, scpi_info); if (scpi_info->is_legacy) { /* Replace with legacy variants */ @@ -1002,23 +1043,23 @@ static int scpi_probe(struct platform_device *pdev) ret = scpi_init_versions(scpi_info); if (ret) { dev_err(dev, "incorrect or no SCP firmware found\n"); + scpi_remove(pdev); return ret; } - scpi_dvfs_populate(dev); - - _dev_info(dev, "SCP Protocol %lu.%lu Firmware %lu.%lu.%lu version\n", - FIELD_GET(PROTO_REV_MAJOR_MASK, scpi_info->protocol_version), - FIELD_GET(PROTO_REV_MINOR_MASK, scpi_info->protocol_version), - FIELD_GET(FW_REV_MAJOR_MASK, scpi_info->firmware_version), - FIELD_GET(FW_REV_MINOR_MASK, scpi_info->firmware_version), - FIELD_GET(FW_REV_PATCH_MASK, scpi_info->firmware_version)); + _dev_info(dev, "SCP Protocol %d.%d Firmware %d.%d.%d version\n", + PROTOCOL_REV_MAJOR(scpi_info->protocol_version), + PROTOCOL_REV_MINOR(scpi_info->protocol_version), + FW_REV_MAJOR(scpi_info->firmware_version), + FW_REV_MINOR(scpi_info->firmware_version), + FW_REV_PATCH(scpi_info->firmware_version)); + scpi_info->scpi_ops = &scpi_ops; - ret = devm_device_add_groups(dev, versions_groups); + ret = sysfs_create_groups(&dev->kobj, versions_groups); if (ret) dev_err(dev, "unable to create sysfs version group\n"); - return devm_of_platform_populate(dev); + return of_platform_populate(dev->of_node, NULL, NULL, dev); } static const struct of_device_id scpi_of_match[] = { @@ -1035,6 +1076,7 @@ static struct platform_driver scpi_driver = { .of_match_table = scpi_of_match, }, .probe = scpi_probe, + .remove = scpi_remove, }; module_platform_driver(scpi_driver); |