[U-Boot] [PATCH v2 32/80] dm: usb: tegra: Store the controller type explicitly

[Simon Glass]

At present the tegra driver uses a separate pointer to know which controller
type is in use. This works because only one controller type is used at a
time.

With driver model we want to make the controller state hermetic in the sense
that it is not necessary to look elsewhere to know the controller type. This
will permit a controller to implement the EHCI weak functions without
reference to global data structures.

To achieve this, define an enum for the controller type and store it with
the information on each EHCI controller.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2: None

 drivers/usb/host/ehci-tegra.c | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 0831fe9..9a73e60 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -61,6 +61,14 @@ enum dr_mode {
 	DR_MODE_OTG,		/* supports both */
 };
 
+enum usb_ctlr_type {
+	USB_CTLR_T20,
+	USB_CTLR_T30,
+	USB_CTLR_T114,
+
+	USB_CTRL_COUNT,
+};
+
 /* Information about a USB port */
 struct fdt_usb {
 	struct usb_ctlr *reg;	/* address of registers in physical memory */
@@ -69,6 +77,7 @@ struct fdt_usb {
 	unsigned enabled:1;	/* 1 to enable, 0 to disable */
 	unsigned has_legacy_mode:1; /* 1 if this port has legacy mode */
 	unsigned initialized:1; /* has this port already been initialized? */
+	enum usb_ctlr_type type;
 	enum usb_init_type init_type;
 	enum dr_mode dr_mode;	/* dual role mode */
 	enum periph_id periph_id;/* peripheral id */
@@ -162,7 +171,7 @@ struct fdt_usb_controller {
 	const unsigned *pll_parameter;
 };
 
-static struct fdt_usb_controller fdt_usb_controllers[] = {
+static struct fdt_usb_controller fdt_usb_controllers[USB_CTRL_COUNT] = {
 	{
 		.compat		= COMPAT_NVIDIA_TEGRA20_USB,
 		.has_hostpc	= 0,
@@ -284,7 +293,7 @@ void usbf_reset_controller(struct fdt_usb *config, struct usb_ctlr *usbctlr)
 		setbits_le32(&usbctlr->susp_ctrl, UTMIP_PHY_ENB);
 }
 
-static const unsigned *get_pll_timing(void)
+static const unsigned *get_pll_timing(struct fdt_usb_controller *controller)
 {
 	const unsigned *timing;
 
@@ -331,6 +340,7 @@ static void init_phy_mux(struct fdt_usb *config, uint pts,
 static int init_utmi_usb_controller(struct fdt_usb *config,
 				    enum usb_init_type init)
 {
+	struct fdt_usb_controller *controller;
 	u32 b_sess_valid_mask, val;
 	int loop_count;
 	const unsigned *timing;
@@ -363,11 +373,14 @@ static int init_utmi_usb_controller(struct fdt_usb *config,
 			VBUS_SENSE_CTL_MASK,
 			VBUS_SENSE_CTL_A_SESS_VLD << VBUS_SENSE_CTL_SHIFT);
 
+	controller = &fdt_usb_controllers[config->type];
+	debug("controller=%p, type=%d\n", controller, config->type);
+
 	/*
 	 * PLL Delay CONFIGURATION settings. The following parameters control
 	 * the bring up of the plls.
 	 */
-	timing = get_pll_timing();
+	timing = get_pll_timing(controller);
 
 	if (!controller->has_hostpc) {
 		val = readl(&usbctlr->utmip_misc_cfg1);
@@ -702,10 +715,12 @@ static int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config)
  * @blob:	fdt blob
  * @node_list:	list of nodes to process (any <=0 are ignored)
  * @count:	number of nodes to process
+ * @id:		controller type (enum usb_ctlr_type)
  *
  * Return:	0 - ok, -1 - error
  */
-static int process_usb_nodes(const void *blob, int node_list[], int count)
+static int process_usb_nodes(const void *blob, int node_list[], int count,
+			     enum usb_ctlr_type id)
 {
 	struct fdt_usb config;
 	int node, i;
@@ -729,9 +744,11 @@ static int process_usb_nodes(const void *blob, int node_list[], int count)
 			return -1;
 		}
 		if (!clk_done) {
-			config_clock(get_pll_timing());
+			config_clock(get_pll_timing(
+					&fdt_usb_controllers[id]));
 			clk_done = 1;
 		}
+		config.type = id;
 		config.initialized = 0;
 
 		/* add new USB port to the list of available ports */
@@ -753,7 +770,7 @@ int usb_process_devicetree(const void *blob)
 		count = fdtdec_find_aliases_for_id(blob, "usb",
 			controller->compat, node_list, USB_PORTS_MAX);
 		if (count) {
-			err = process_usb_nodes(blob, node_list, count);
+			err = process_usb_nodes(blob, node_list, count, i);
 			if (err)
 				printf("%s: Error processing USB node!\n",
 				       __func__);
@@ -786,6 +803,7 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 		return -1;
 
 	config = &port[index];
+	ehci_set_controller_priv(index, config);
 
 	switch (init) {
 	case USB_INIT_HOST:
-- 
2.2.0.rc0.207.ga3a616c