On Thu, Jan 17, 2019 at 05:09:03PM -0800, Ajay Gupta wrote:
> Function is to get the details of ccg firmware and device version.
>
> Signed-off-by: Ajay Gupta <aj...@nvidia.com>
> ---
> drivers/usb/typec/ucsi/ucsi_ccg.c | 76 ++++++++++++++++++++++++++++++-
> 1 file changed, 74 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c
> b/drivers/usb/typec/ucsi/ucsi_ccg.c
> index de8a43bdff68..4d35279ab853 100644
> --- a/drivers/usb/typec/ucsi/ucsi_ccg.c
> +++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
> @@ -17,15 +17,46 @@
> #include <asm/unaligned.h>
> #include "ucsi.h"
>
> +struct ccg_dev_info {
> + u8 fw_mode:2;
> + u8 two_pd_ports:2;
> + u8 row_size_256:2;
> + u8:1; /* reserved */
> + u8 hpi_v2_mode:1;
> + u8 bl_mode:1;
> + u8 cfgtbl_invalid:1;
> + u8 fw1_invalid:1;
> + u8 fw2_invalid:1;
> + u8:4; /* reserved */
> + u16 silicon_id;
> + u16 bl_last_row;
> +} __packed;
Doesn't all of this break into tiny pieces when you read the memory into
a big-endian system? Be very careful when using bitfields as a "raw"
representation of a structure in memory.
> +
> +struct version_format {
> + u16 build;
> + u8 patch;
> + u8 min:4;
> + u8 maj:4;
> +};
Same here.
And not packed? That's dangerous :)
> +
> +struct version_info {
> + struct version_format base;
> + struct version_format app;
> +};
> +
> struct ucsi_ccg {
> struct device *dev;
> struct ucsi *ucsi;
> struct ucsi_ppm ppm;
> struct i2c_client *client;
> + struct ccg_dev_info info;
> };
>
> -#define CCGX_RAB_INTR_REG 0x06
> -#define CCGX_RAB_UCSI_CONTROL 0x39
> +#define CCGX_RAB_DEVICE_MODE 0x0000
> +#define CCGX_RAB_INTR_REG 0x0006
> +#define CCGX_RAB_READ_ALL_VER 0x0010
> +#define CCGX_RAB_READ_FW2_VER 0x0020
> +#define CCGX_RAB_UCSI_CONTROL 0x0039
> #define CCGX_RAB_UCSI_CONTROL_START BIT(0)
> #define CCGX_RAB_UCSI_CONTROL_STOP BIT(1)
> #define CCGX_RAB_UCSI_DATA_BLOCK(offset) (0xf000 | ((offset) & 0xff))
> @@ -220,6 +251,41 @@ static irqreturn_t ccg_irq_handler(int irq, void *data)
> return IRQ_HANDLED;
> }
>
> +static int get_fw_info(struct ucsi_ccg *uc)
> +{
> + struct device *dev = uc->dev;
> + struct version_info version[3];
> + struct version_info *v;
> + int err, i;
> +
> + err = ccg_read(uc, CCGX_RAB_READ_ALL_VER, (u8 *)(&version),
> + sizeof(version));
> + if (err < 0)
> + return err;
> +
> + for (i = 1; i < ARRAY_SIZE(version); i++) {
> + v = &version[i];
> + dev_dbg(dev,
> + "FW%d Version: %c%c v%x.%x%x, [Base %d.%d.%d.%d]\n",
> + i, (v->app.build >> 8), (v->app.build & 0xFF),
> + v->app.patch, v->app.maj, v->app.min,
> + v->base.maj, v->base.min, v->base.patch,
> + v->base.build);
> + }
> +
> + err = ccg_read(uc, CCGX_RAB_DEVICE_MODE, (u8 *)(&uc->info),
> + sizeof(uc->info));
> + if (err < 0)
> + return err;
> +
> + dev_dbg(dev, "fw_mode: %d\n", uc->info.fw_mode);
> + dev_dbg(dev, "fw1_invalid: %d\n", uc->info.fw1_invalid);
> + dev_dbg(dev, "fw2_invalid: %d\n", uc->info.fw2_invalid);
> + dev_dbg(dev, "silicon_id: 0x%04x\n", uc->info.silicon_id);
> +
> + return 0;
> +}
> +
> static int ucsi_ccg_probe(struct i2c_client *client,
> const struct i2c_device_id *id)
> {
> @@ -248,6 +314,12 @@ static int ucsi_ccg_probe(struct i2c_client *client,
> return status;
> }
>
> + status = get_fw_info(uc);
> + if (status < 0) {
> + dev_err(uc->dev, "get_fw_info failed - %d\n", status);
> + return status;
Are all devices required to have this information? if not, you just
prevented them from working I think :(
thanks,
greg k-h
