* suspend.
* The value of this field must be set while POR is
* active.
- * @p_rtype: PHY reference clock type (CN50XX/CN52XX/CN56XX only)
- * '0' The USB-PHY uses a 12MHz crystal as a clock
- * source at the USB_XO and USB_XI pins
- * '1' Reserved
- * '2' The USB_PHY uses 12/24/48MHz 2.5V board clock
- * at the USB_XO pin. USB_XI should be tied to
- * ground in this case.
- * '3' Reserved
- * (bit 14 was P_XENBN on 3xxx)
- * (bit 15 was P_RCLK on 3xxx)
+ * @p_rtype: PHY reference clock type
+ * On CN50XX/CN52XX/CN56XX the values are:
+ * '0' The USB-PHY uses a 12MHz crystal as a clock source
+ * at the USB_XO and USB_XI pins.
+ * '1' Reserved.
+ * '2' The USB_PHY uses 12/24/48MHz 2.5V board clock at the
+ * USB_XO pin. USB_XI should be tied to ground in this
+ * case.
+ * '3' Reserved.
+ * On CN3xxx bits 14 and 15 are p_xenbn and p_rclk and values are:
+ * '0' Reserved.
+ * '1' Reserved.
+ * '2' The PHY PLL uses the XO block output as a reference.
+ * The XO block uses an external clock supplied on the
+ * XO pin. USB_XI should be tied to ground for this
+ * usage.
+ * '3' The XO block uses the clock from a crystal.
* @p_com_on: '0' Force USB-PHY XO Bias, Bandgap and PLL to
* remain powered in Suspend Mode.
* '1' The USB-PHY XO Bias, Bandgap and PLL are
uint64_t hrst : 1;
uint64_t divide : 3;
} s;
- /**
- * struct cvmx_usbnx_clk_ctl_cn30xx
- * @hclk_rst: When this field is '0' the HCLK-DIVIDER used to
- * generate the hclk in the USB Subsystem is held
- * in reset. This bit must be set to '0' before
- * changing the value os DIVIDE in this register.
- * The reset to the HCLK_DIVIDERis also asserted
- * when core reset is asserted.
- * @p_x_on: Force USB-PHY on during suspend.
- * '1' USB-PHY XO block is powered-down during
- * suspend.
- * '0' USB-PHY XO block is powered-up during
- * suspend.
- * The value of this field must be set while POR is
- * active.
- * @p_rclk: Phy refrence clock enable.
- * '1' The PHY PLL uses the XO block output as a
- * reference.
- * '0' Reserved.
- * @p_xenbn: Phy external clock enable.
- * '1' The XO block uses the clock from a crystal.
- * '0' The XO block uses an external clock supplied
- * on the XO pin. USB_XI should be tied to
- * ground for this usage.
- * @p_com_on: '0' Force USB-PHY XO Bias, Bandgap and PLL to
- * remain powered in Suspend Mode.
- * '1' The USB-PHY XO Bias, Bandgap and PLL are
- * powered down in suspend mode.
- * The value of this field must be set while POR is
- * active.
- * @p_c_sel: Phy clock speed select.
- * Selects the reference clock / crystal frequency.
- * '11': Reserved
- * '10': 48 MHz
- * '01': 24 MHz
- * '00': 12 MHz
- * The value of this field must be set while POR is
- * active.
- * @cdiv_byp: Used to enable the bypass input to the USB_CLK_DIV.
- * @sd_mode: Scaledown mode for the USBC. Control timing events
- * in the USBC, for normal operation this must be '0'.
- * @s_bist: Starts bist on the hclk memories, during the '0'
- * to '1' transition.
- * @por: Power On Reset for the PHY.
- * Resets all the PHYS registers and state machines.
- * @enable: When '1' allows the generation of the hclk. When
- * '0' the hclk will not be generated.
- * @prst: When this field is '0' the reset associated with
- * the phy_clk functionality in the USB Subsystem is
- * help in reset. This bit should not be set to '1'
- * until the time it takes 6 clocks (hclk or phy_clk,
- * whichever is slower) has passed. Under normal
- * operation once this bit is set to '1' it should not
- * be set to '0'.
- * @hrst: When this field is '0' the reset associated with
- * the hclk functioanlity in the USB Subsystem is
- * held in reset.This bit should not be set to '1'
- * until 12ms after phy_clk is stable. Under normal
- * operation, once this bit is set to '1' it should
- * not be set to '0'.
- * @divide: The 'hclk' used by the USB subsystem is derived
- * from the eclk. The eclk will be divided by the
- * value of this field +1 to determine the hclk
- * frequency. (Also see HRST of this register).
- * The hclk frequency must be less than 125 MHz.
- */
- struct cvmx_usbnx_clk_ctl_cn30xx {
- uint64_t reserved_18_63 : 46;
- uint64_t hclk_rst : 1;
- uint64_t p_x_on : 1;
- uint64_t p_rclk : 1;
- uint64_t p_xenbn : 1;
- uint64_t p_com_on : 1;
- uint64_t p_c_sel : 2;
- uint64_t cdiv_byp : 1;
- uint64_t sd_mode : 2;
- uint64_t s_bist : 1;
- uint64_t por : 1;
- uint64_t enable : 1;
- uint64_t prst : 1;
- uint64_t hrst : 1;
- uint64_t divide : 3;
- } cn30xx;
- struct cvmx_usbnx_clk_ctl_cn30xx cn31xx;
};
/**
* source at USB_XO. USB_XI should be tied to GND.
* Most Octeon evaluation boards require this setting
*/
- if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
- /* From CN31XX,CN30XX manual */
- usbn_clk_ctl.cn31xx.p_rclk = 1;
- usbn_clk_ctl.cn31xx.p_xenbn = 0;
- } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
- /* From CN56XX,CN50XX manual */
- usbn_clk_ctl.s.p_rtype = 2;
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX) ||
+ OCTEON_IS_MODEL(OCTEON_CN56XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN50XX))
+ /* From CN56XX,CN50XX,CN31XX,CN30XX manuals */
+ usbn_clk_ctl.s.p_rtype = 2; /* p_rclk=1 & p_xenbn=0 */
else
/* From CN52XX manual */
usbn_clk_ctl.s.p_rtype = 1;
* The USB port uses a 12MHz crystal as clock source
* at USB_XO and USB_XI
*/
- if (OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
+ if (OCTEON_IS_MODEL(OCTEON_CN3XXX))
/* From CN31XX,CN30XX manual */
- usbn_clk_ctl.cn31xx.p_rclk = 1;
- usbn_clk_ctl.cn31xx.p_xenbn = 1;
- } else if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN50XX))
- /* From CN56XX,CN50XX manual */
- usbn_clk_ctl.s.p_rtype = 0;
+ usbn_clk_ctl.s.p_rtype = 3; /* p_rclk=1 & p_xenbn=1 */
else
- /* From CN52XX manual */
+ /* From CN56XX,CN52XX,CN50XX manuals. */
usbn_clk_ctl.s.p_rtype = 0;
usbn_clk_ctl.s.p_c_sel = 0;
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